From 1acc09943904d636fa7caa54776033fc5315b2e1 Mon Sep 17 00:00:00 2001
From: Aleksei Khoroshilov <5928869+goodov@users.noreply.github.com>
Date: Wed, 23 Oct 2024 15:11:11 +0700
Subject: [PATCH] Migrate to per-study file structure.

---
 .github/CODEOWNERS                            |  12 +-
 .github/workflows/generate-test-seed.yml      |  14 +--
 .github/workflows/test-src.yml                |  11 ++
 README.md                                     |  26 ++--
 src/README.md                                 |  10 +-
 src/scripts/lint.ts                           |   3 +-
 studies/AllowCertainClientHintsStudy.json5    |  34 +++++
 studies/BraveAIChatEnabledStudy.json5         |  31 +++++
 ...eAdblockExperimentalListDefaultStudy.json5 |  33 +++++
 ...dblockMobileNotificationsListDefault.json5 |  33 +++++
 ...iveAdModelBasedPredictorRecencyStudy.json5 |  43 +++++++
 studies/BraveAdsAdEventStudy.json5            |  44 +++++++
 studies/BraveAdsConversionsStudy.json5        |  40 ++++++
 studies/BraveAdsExclusionRulesStudy.json5     |  40 ++++++
 studies/BraveAdsNewTabPageAdsStudy.json5      |  40 ++++++
 studies/BraveAdsSiteVisitStudy.json5          |  44 +++++++
 ...ClassificationPageProbabilitiesStudy.json5 |  40 ++++++
 ...veAggressiveModeRetirementExperiment.json5 |  34 +++++
 studies/BraveAutoTranslateStudy.json5         |  34 +++++
 ...leanupSessionCookiesOnSessionRestore.json5 |  27 ++++
 studies/BraveDebounceStudy.json5              |  43 +++++++
 studies/BraveFallbackDoHStudy.json5           |  37 ++++++
 studies/BraveFeedUpdateStudy.json5            |  30 +++++
 studies/BraveForgetFirstPartyStorage.json5    | 119 ++++++++++++++++++
 .../BraveGoogleSignInPermissionStudy.json5    |  81 ++++++++++++
 ...raveHorizontalTabsUpdateEnabledStudy.json5 |  55 ++++++++
 .../BraveLocalhostAccessPermissionStudy.json5 |  32 +++++
 studies/BraveP3AConstellationEnabled.json5    |  33 +++++
 studies/BraveP3AJSONOtherDeprecation.json5    |  32 +++++
 studies/BraveP3ANebulaNightlyBeta.json5       |  33 +++++
 studies/BraveP3ANebulaRelease.json5           |  32 +++++
 ...raveP3ATypicalJSONDeprecationEnabled.json5 |  33 +++++
 studies/BraveRequestOTRTabRolloutStudy.json5  |  31 +++++
 ...ewardsAllowSelfCustodyProvidersStudy.json5 |  29 +++++
 studies/BraveRewardsWebUiPanelStudy.json5     |  33 +++++
 studies/BraveRoundTimeStampsStudy.json5       |  35 ++++++
 ...raveScreenFingerprintingBlockerStudy.json5 |  89 +++++++++++++
 studies/BraveSearchAdStudy.json5              |  67 ++++++++++
 studies/BraveSearchPromotionBannerStudy.json5 |  77 ++++++++++++
 ...veSearchPromotionBannerStudyOnStable.json5 |  79 ++++++++++++
 studies/BraveTranslateStudy.json5             |  36 ++++++
 studies/BraveWalletAnkrBalancesEnabled.json5  |  33 +++++
 studies/BraveWebViewRoundedCornersStudy.json5 |  27 ++++
 ...bcompatExceptionsServiceReleaseStudy.json5 |  32 +++++
 ...BraveWebcompatExceptionsServiceStudy.json5 |  33 +++++
 studies/CanvasKillSwitches.json5              |  31 +++++
 studies/ClampPlatformVersionClientHint.json5  |  30 +++++
 studies/CloseWatcher.json5                    |  31 +++++
 ...ollectWebGPUSupportMetricsKillSwitch.json5 |  28 +++++
 studies/CookieListDefaultStudy.json5          |  33 +++++
 .../CosmeticFilteringChildFramesStudy.json5   |  33 +++++
 studies/CrossPlatformVPNStudy.json5           |  34 +++++
 studies/Default1pBlockingStudy.json5          |  81 ++++++++++++
 studies/DefaultBraveCommandsStudy.json5       |  31 +++++
 .../DefaultBraveOmniboxMoreHistoryStudy.json5 |  30 +++++
 ...efaultPassthroughCommandDecoderStudy.json5 |  31 +++++
 studies/DefaultPlaylistStudy.json5            |  30 +++++
 .../DisableCnameUncloakingForAndroid.json5    |  30 +++++
 studies/DisableReduceLanguage.json5           |  38 ++++++
 studies/EphemeralStorageStudy.json5           |  81 ++++++++++++
 studies/ExtensionsManifestV2Study.json5       |  32 +++++
 .../ExtensionsManifestV2StudyRelease.json5    |  31 +++++
 studies/HangWatcher.json5                     |  57 +++++++++
 studies/HeapProfilingMacKillSwitch.json5      |  28 +++++
 studies/InnerHTMLParserFastpathStudy.json5    |  34 +++++
 studies/MacCoreLocationBackendStudy.json5     |  40 ++++++
 studies/MetricsAndCrashSampling.json5         |  30 +++++
 studies/ModuleFileNamePatchStudy.json5        |  30 +++++
 studies/ModuleFileNamePatchStudyRelease.json5 |  29 +++++
 ...eadingOptimizationsCompatOldVersions.json5 |  31 +++++
 studies/NewiOSPlaylistUIStudy.json5           |  29 +++++
 studies/PartitionedCookies.json5              |  34 +++++
 .../PostFREFixMetricsAndCrashSampling.json5   |  30 +++++
 studies/PrettyPrintJSONDocument.json5         |  31 +++++
 studies/PrivateNetworkAccessKillswitch.json5  |  32 +++++
 .../RendererAllocatesImagesKillSwitch.json5   |  28 +++++
 studies/SidebarEnabledStudy.json5             |  43 +++++++
 studies/SmilAutoSuspendOnLagKillSwitch.json5  |  31 +++++
 studies/Speedreader TTS.json5                 |  37 ++++++
 studies/UndecryptablePasswords.json5          |  33 +++++
 studies/UseWritePixelsYUV.json5               |  31 +++++
 studies/UserActivityStudy.json5               |  51 ++++++++
 studies/WhatsNewStudy.json5                   |  32 +++++
 studies/WorkaroundNewWindowFlash.json5        |  75 +++++++++++
 84 files changed, 3152 insertions(+), 33 deletions(-)
 create mode 100644 studies/AllowCertainClientHintsStudy.json5
 create mode 100644 studies/BraveAIChatEnabledStudy.json5
 create mode 100644 studies/BraveAdblockExperimentalListDefaultStudy.json5
 create mode 100644 studies/BraveAdblockMobileNotificationsListDefault.json5
 create mode 100644 studies/BraveAds.CreativeAdModelBasedPredictorRecencyStudy.json5
 create mode 100644 studies/BraveAdsAdEventStudy.json5
 create mode 100644 studies/BraveAdsConversionsStudy.json5
 create mode 100644 studies/BraveAdsExclusionRulesStudy.json5
 create mode 100644 studies/BraveAdsNewTabPageAdsStudy.json5
 create mode 100644 studies/BraveAdsSiteVisitStudy.json5
 create mode 100644 studies/BraveAdsTextClassificationPageProbabilitiesStudy.json5
 create mode 100644 studies/BraveAggressiveModeRetirementExperiment.json5
 create mode 100644 studies/BraveAutoTranslateStudy.json5
 create mode 100644 studies/BraveCleanupSessionCookiesOnSessionRestore.json5
 create mode 100644 studies/BraveDebounceStudy.json5
 create mode 100644 studies/BraveFallbackDoHStudy.json5
 create mode 100644 studies/BraveFeedUpdateStudy.json5
 create mode 100644 studies/BraveForgetFirstPartyStorage.json5
 create mode 100644 studies/BraveGoogleSignInPermissionStudy.json5
 create mode 100644 studies/BraveHorizontalTabsUpdateEnabledStudy.json5
 create mode 100644 studies/BraveLocalhostAccessPermissionStudy.json5
 create mode 100644 studies/BraveP3AConstellationEnabled.json5
 create mode 100644 studies/BraveP3AJSONOtherDeprecation.json5
 create mode 100644 studies/BraveP3ANebulaNightlyBeta.json5
 create mode 100644 studies/BraveP3ANebulaRelease.json5
 create mode 100644 studies/BraveP3ATypicalJSONDeprecationEnabled.json5
 create mode 100644 studies/BraveRequestOTRTabRolloutStudy.json5
 create mode 100644 studies/BraveRewardsAllowSelfCustodyProvidersStudy.json5
 create mode 100644 studies/BraveRewardsWebUiPanelStudy.json5
 create mode 100644 studies/BraveRoundTimeStampsStudy.json5
 create mode 100644 studies/BraveScreenFingerprintingBlockerStudy.json5
 create mode 100644 studies/BraveSearchAdStudy.json5
 create mode 100644 studies/BraveSearchPromotionBannerStudy.json5
 create mode 100644 studies/BraveSearchPromotionBannerStudyOnStable.json5
 create mode 100644 studies/BraveTranslateStudy.json5
 create mode 100644 studies/BraveWalletAnkrBalancesEnabled.json5
 create mode 100644 studies/BraveWebViewRoundedCornersStudy.json5
 create mode 100644 studies/BraveWebcompatExceptionsServiceReleaseStudy.json5
 create mode 100644 studies/BraveWebcompatExceptionsServiceStudy.json5
 create mode 100644 studies/CanvasKillSwitches.json5
 create mode 100644 studies/ClampPlatformVersionClientHint.json5
 create mode 100644 studies/CloseWatcher.json5
 create mode 100644 studies/CollectWebGPUSupportMetricsKillSwitch.json5
 create mode 100644 studies/CookieListDefaultStudy.json5
 create mode 100644 studies/CosmeticFilteringChildFramesStudy.json5
 create mode 100644 studies/CrossPlatformVPNStudy.json5
 create mode 100644 studies/Default1pBlockingStudy.json5
 create mode 100644 studies/DefaultBraveCommandsStudy.json5
 create mode 100644 studies/DefaultBraveOmniboxMoreHistoryStudy.json5
 create mode 100644 studies/DefaultPassthroughCommandDecoderStudy.json5
 create mode 100644 studies/DefaultPlaylistStudy.json5
 create mode 100644 studies/DisableCnameUncloakingForAndroid.json5
 create mode 100644 studies/DisableReduceLanguage.json5
 create mode 100644 studies/EphemeralStorageStudy.json5
 create mode 100644 studies/ExtensionsManifestV2Study.json5
 create mode 100644 studies/ExtensionsManifestV2StudyRelease.json5
 create mode 100644 studies/HangWatcher.json5
 create mode 100644 studies/HeapProfilingMacKillSwitch.json5
 create mode 100644 studies/InnerHTMLParserFastpathStudy.json5
 create mode 100644 studies/MacCoreLocationBackendStudy.json5
 create mode 100644 studies/MetricsAndCrashSampling.json5
 create mode 100644 studies/ModuleFileNamePatchStudy.json5
 create mode 100644 studies/ModuleFileNamePatchStudyRelease.json5
 create mode 100644 studies/NavigationThreadingOptimizationsCompatOldVersions.json5
 create mode 100644 studies/NewiOSPlaylistUIStudy.json5
 create mode 100644 studies/PartitionedCookies.json5
 create mode 100644 studies/PostFREFixMetricsAndCrashSampling.json5
 create mode 100644 studies/PrettyPrintJSONDocument.json5
 create mode 100644 studies/PrivateNetworkAccessKillswitch.json5
 create mode 100644 studies/RendererAllocatesImagesKillSwitch.json5
 create mode 100644 studies/SidebarEnabledStudy.json5
 create mode 100644 studies/SmilAutoSuspendOnLagKillSwitch.json5
 create mode 100644 studies/Speedreader TTS.json5
 create mode 100644 studies/UndecryptablePasswords.json5
 create mode 100644 studies/UseWritePixelsYUV.json5
 create mode 100644 studies/UserActivityStudy.json5
 create mode 100644 studies/WhatsNewStudy.json5
 create mode 100644 studies/WorkaroundNewWindowFlash.json5

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 4420cad4..2bad1dde 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -3,6 +3,12 @@
 # Griffin maintainers are responsible for all machinery in this repository.
 * @brave/griffin-maintainers
 
-# The seed file is owned by the uplift team as any change to it directly affects
-# public builds. It's important to update the seed in a controlled manner.
-/seed/seed.json @brave/uplift-approvers
+# The seed directory is deprecated and no longer used for the seed generation.
+# However, it is used by the perf infrastructure to access the Griffin seed at
+# some point in the past. Lock it to Griffin maintainers to prevent any
+# unrelated changes.
+/seed/** @brave/griffin-maintainers
+
+# The studies are owned by the uplift team as any change directly affects public
+# builds. It's important to update studies in a controlled manner.
+/studies/*.json5 @brave/uplift-approvers
diff --git a/.github/workflows/generate-test-seed.yml b/.github/workflows/generate-test-seed.yml
index c8a849ea..a79f8efa 100644
--- a/.github/workflows/generate-test-seed.yml
+++ b/.github/workflows/generate-test-seed.yml
@@ -4,7 +4,6 @@ on:
   pull_request:
     paths:
       - '.github/workflows/generate-test-seed.yml'
-      - 'seed/seed.json'
       - 'studies/**'
 
 jobs:
@@ -23,14 +22,6 @@ jobs:
       - name: Fetch base commit
         run: git fetch --depth=1 origin "$BASE_SHA"
 
-      - name: Setup Python
-        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5
-        with:
-          python-version: '3.11'
-
-      - name: Install python requirements
-        run: pip install -r seed/requirements.txt
-
       - name: Comment "Generation In Progress"
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with:
@@ -64,10 +55,7 @@ jobs:
 
       - name: Generate seed
         run: |
-          # Use only python implementation for now.
-          python seed/serialize.py seed/seed.json --version "$SEED_VERSION"
-          # TODO: enable this when per-file studies will be synced with seed.json.
-          # npm run seed_tools -- create_seed studies seed.bin --version "$SEED_VERSION"
+          npm run seed_tools create -- --version "$SEED_VERSION"
 
       - name: Upload seed
         env:
diff --git a/.github/workflows/test-src.yml b/.github/workflows/test-src.yml
index 5d0b05fd..d091ba01 100644
--- a/.github/workflows/test-src.yml
+++ b/.github/workflows/test-src.yml
@@ -24,3 +24,14 @@ jobs:
 
       - name: build
         run: npm run build
+
+      - name: Setup Python
+        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5
+        with:
+          python-version: '3.11'
+
+      - name: Install python seed generator requirements
+        run: pip install -r seed/requirements.txt
+
+      - name: Compare python and typescript seed generator
+        run: npm run seed_tools compare_python_gen
diff --git a/README.md b/README.md
index 6a9dea36..dd71b46f 100644
--- a/README.md
+++ b/README.md
@@ -9,36 +9,40 @@ See the [Wiki](<https://github.com/brave/brave-browser/wiki/Brave-Variations-(Gr
 A continuous integration server (CI) serializes and signs the updated seed file before publishing it to a CDN endpoint at https://variations.brave.com/seed. To browse the contents of the seed file a dashboard is hosted at https://griffin.brave.com. The repo is organized as follows:
 
 - `/crypto` contains a util to create key pairs and sign the seed file.
-- `/seed` contains the JSON seed definition and serialisation code.
-- `/src` contains the web dashboard to browse the seed contents and tracker code the track changes. See https://github.com/brave/brave-variations/blob/main/src/README.md for details.
+- `/seed` contains a deprecated JSON seed definition and serialisation code.
+- `/src` contains the web dashboard to browse the seed contents, the tracker code to track seed changes and the current seed generator. See [src/README.md](src/README.md) for details.
+- `/studies` contains the studies used to generate the seed.
 
-## Git flow
+## Git flow for `/studies`
 
-1. Work in feature branch and when done create a PR to `main` branch.
-2. Verify that everything works as intended via PR instructions (use `--variations-pr` flag).
+1. Create/modify a study in `/studies`, follow the protobuf schema in [`src/proto/study.proto`](/src/proto/study.proto).
+2. Run `npm run seed_tools lint`, resolve issues, optionally pass `-- --fix` to fix formatting issues.
+3. Create a PR to `main` branch.
+4. Verify that everything works as intended using PR instructions.
 
 ## Key Generation and Exchange
 
-On initial deployment and subsequent key rotations a new key pair has to be generated. The public key is exchanged by patching the hard-coded public key bytes in [variations_seed_store.cc#L37](https://source.chromium.org/chromium/chromium/src/+/master:components/variations/variations_seed_store.cc;l=37):
+On initial deployment and subsequent key rotations a new key pair has to be generated. The public key is exchanged by patching the hard-coded public key bytes in [variations_seed_store.cc](https://source.chromium.org/chromium/chromium/src/+/main:components/variations/variations_seed_store.cc;l=54;drc=5e751800f8e981ee6a18db8a8fa00883a851ecf7):
 
 1. Generate a key pair with `$ go run ./crypto/crypto_util.go keygen`.
-2. Update the [patched public key](https://github.com/brave/brave-core/blob/master/chromium_src/components/variations/variations_seed_store.cc#L6) in brave-core.
+2. Update the [patched public key](https://github.com/brave/brave-core/blob/e2ded454bd2153e8e1a46be7ae13bbd540cf0d6d/chromium_src/components/variations/variations_seed_store.cc#L44-L53) in brave-core.
 3. Store the private key in a secure vault and ensure it is accessible by CI.
 
 ## Seed Serialization, Signing and Serving
 
 The following steps are performed by CI to publish the updated seed file:
 
-1. Run `$ python seed/serialize.py seed/seed.json` to compile the protobuf.
+1. Run `$ npm run seed_tools create` to compile the protobuf.
 2. Sign the seed file with `$ go run /crypto/crypto_util.go sign`.
 3. Update the `X-Seed-Signature` response header.
 4. Update the ETAG header with the contents of `serialnumber`.
+5. Gzip the seed and set `Content-Encoding: gzip` response header.
 
 Constraints:
 
-- All studies are [one time randomized](https://source.chromium.org/chromium/chromium/src/+/main:base/metrics/field_trial.h;l=99).
-- Platform and channel filters must be applied. See `PLATFORMS` and `CHANNELS` constants in `serialize.py`.
-- Brave Ads studies must contain the stubstring "BraveAds" in their study name. Only one ads study with page visible side effects is allowed to run. Multiple studies without visible side effects can run simultanesouly.
+- All studies are [one time randomized](https://source.chromium.org/chromium/chromium/src/+/main:base/metrics/field_trial.h;l=43;drc=60a72b0afdb415164c8f72cb0cada4317e4464a1).
+- Platform and channel filters must be applied.
+- Brave Ads studies must contain the substring "BraveAds" in their study name. Only one ads study with page visible side effects is allowed to run. Multiple studies without visible side effects can run simultanesouly.
 
 ## Some Notes on using variations in the Browser
 
diff --git a/src/README.md b/src/README.md
index 59664870..563f86ad 100644
--- a/src/README.md
+++ b/src/README.md
@@ -1,4 +1,4 @@
-# Griffin & Finch Tracker
+# Griffin & Finch Tracker & Seed Tools
 
 ## Directory structure
 
@@ -6,11 +6,13 @@
 
 `finch_tracker` - NodeJS/TS console app to track seed changes. See https://github.com/brave/finch-data-private/#finch-tracker
 
-`web` WebUI hosted on griffin.brave.com. It parses raw seed data and shows them in human readable format. Doesn't use any sophisticated backend, 100% code runs on the client side.
+`proto` chromium protobuf files describing seed data format.
 
-`test` is supporting code/data to use in tests
+`seed_tools` seed generator and related tools to create the seed from `/studies` directory.
 
-`proto` chromium protobuf files describing seed data format.
+`test` is supporting code/data to use in tests.
+
+`web` WebUI hosted on griffin.brave.com. It parses raw seed data and shows them in human readable format. Doesn't use any sophisticated backend, 100% code runs on the client side.
 
 ## Commands and actions
 
diff --git a/src/scripts/lint.ts b/src/scripts/lint.ts
index f920b880..95a33524 100644
--- a/src/scripts/lint.ts
+++ b/src/scripts/lint.ts
@@ -41,8 +41,7 @@ function getLintAllCommands(options: Options): string[] {
   return [
     'prettier . --ignore-unknown' + (options.fix ? ' --write' : ' --check'),
     'eslint . --config src/.eslintrc.js' + (options.fix ? ' --fix' : ''),
-    // TODO(goodov): Enable when per-file structure appears.
-    // 'npm run seed_tools lint --' + (options.fix ? ' --fix' : ''),
+    'npm run seed_tools lint --' + (options.fix ? ' --fix' : ''),
   ];
 }
 
diff --git a/studies/AllowCertainClientHintsStudy.json5 b/studies/AllowCertainClientHintsStudy.json5
new file mode 100644
index 00000000..cd4ca57e
--- /dev/null
+++ b/studies/AllowCertainClientHintsStudy.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'AllowCertainClientHintsStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'AllowCertainClientHints',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '104.1.44.59',
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAIChatEnabledStudy.json5 b/studies/BraveAIChatEnabledStudy.json5
new file mode 100644
index 00000000..e3b7e42f
--- /dev/null
+++ b/studies/BraveAIChatEnabledStudy.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'BraveAIChatEnabledStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'AIChat',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '119.1.60.0',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdblockExperimentalListDefaultStudy.json5 b/studies/BraveAdblockExperimentalListDefaultStudy.json5
new file mode 100644
index 00000000..a94a9f9c
--- /dev/null
+++ b/studies/BraveAdblockExperimentalListDefaultStudy.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveAdblockExperimentalListDefaultStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockExperimentalListDefault',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '123.1.66.53',
+      channel: [
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdblockMobileNotificationsListDefault.json5 b/studies/BraveAdblockMobileNotificationsListDefault.json5
new file mode 100644
index 00000000..ca42919e
--- /dev/null
+++ b/studies/BraveAdblockMobileNotificationsListDefault.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveAdblockMobileNotificationsListDefault',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockMobileNotificationsListDefault',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAds.CreativeAdModelBasedPredictorRecencyStudy.json5 b/studies/BraveAds.CreativeAdModelBasedPredictorRecencyStudy.json5
new file mode 100644
index 00000000..3f61f55a
--- /dev/null
+++ b/studies/BraveAds.CreativeAdModelBasedPredictorRecencyStudy.json5
@@ -0,0 +1,43 @@
+[
+  {
+    name: 'BraveAds.CreativeAdModelBasedPredictorRecencyStudy',
+    experiment: [
+      {
+        name: 'NoRecency',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'CreativeNotificationAdModelBasedPredictor',
+            'CreativeNewTabPageAdModelBasedPredictor',
+            'CreativeInlineContentAdModelBasedPredictor',
+          ],
+        },
+        param: [
+          {
+            name: 'last_seen_ad_predictor_weight',
+            value: '0.0',
+          },
+          {
+            name: 'last_seen_advertiser_predictor_weight',
+            value: '0.0',
+          },
+        ],
+      },
+    ],
+    filter: {
+      max_version: '128.1.69.51',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsAdEventStudy.json5 b/studies/BraveAdsAdEventStudy.json5
new file mode 100644
index 00000000..91e915b0
--- /dev/null
+++ b/studies/BraveAdsAdEventStudy.json5
@@ -0,0 +1,44 @@
+[
+  {
+    name: 'BraveAdsAdEventStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'AdEvent',
+          ],
+        },
+        param: [
+          {
+            name: 'debounce_clicked_ad_event_for',
+            value: '1s',
+          },
+          {
+            name: 'deduplicate_clicked_ad_event_for',
+            value: '1s',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsConversionsStudy.json5 b/studies/BraveAdsConversionsStudy.json5
new file mode 100644
index 00000000..746f82e3
--- /dev/null
+++ b/studies/BraveAdsConversionsStudy.json5
@@ -0,0 +1,40 @@
+[
+  {
+    name: 'BraveAdsConversionsStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'Conversions',
+          ],
+        },
+        param: [
+          {
+            name: 'creative_set_conversion_cap',
+            value: '0',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsExclusionRulesStudy.json5 b/studies/BraveAdsExclusionRulesStudy.json5
new file mode 100644
index 00000000..aade3ee6
--- /dev/null
+++ b/studies/BraveAdsExclusionRulesStudy.json5
@@ -0,0 +1,40 @@
+[
+  {
+    name: 'BraveAdsExclusionRulesStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ExclusionRules',
+          ],
+        },
+        param: [
+          {
+            name: 'should_exclude_ad_if_creative_set_exceeds_conversion_cap',
+            value: '0',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsNewTabPageAdsStudy.json5 b/studies/BraveAdsNewTabPageAdsStudy.json5
new file mode 100644
index 00000000..8916704d
--- /dev/null
+++ b/studies/BraveAdsNewTabPageAdsStudy.json5
@@ -0,0 +1,40 @@
+[
+  {
+    name: 'BraveAdsNewTabPageAdsStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'NewTabPageAds',
+          ],
+        },
+        param: [
+          {
+            name: 'minimum_wait_time',
+            value: '1m',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsSiteVisitStudy.json5 b/studies/BraveAdsSiteVisitStudy.json5
new file mode 100644
index 00000000..14703b48
--- /dev/null
+++ b/studies/BraveAdsSiteVisitStudy.json5
@@ -0,0 +1,44 @@
+[
+  {
+    name: 'BraveAdsSiteVisitStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'SiteVisitFeature',
+          ],
+        },
+        param: [
+          {
+            name: 'page_land_after',
+            value: '5s',
+          },
+          {
+            name: 'page_land_cap',
+            value: '0',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAdsTextClassificationPageProbabilitiesStudy.json5 b/studies/BraveAdsTextClassificationPageProbabilitiesStudy.json5
new file mode 100644
index 00000000..fb8b2f7b
--- /dev/null
+++ b/studies/BraveAdsTextClassificationPageProbabilitiesStudy.json5
@@ -0,0 +1,40 @@
+[
+  {
+    name: 'BraveAdsTextClassificationPageProbabilitiesStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'TextClassification',
+          ],
+        },
+        param: [
+          {
+            name: 'page_probabilities_history_size',
+            value: '15',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAggressiveModeRetirementExperiment.json5 b/studies/BraveAggressiveModeRetirementExperiment.json5
new file mode 100644
index 00000000..8bd3370d
--- /dev/null
+++ b/studies/BraveAggressiveModeRetirementExperiment.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'BraveAggressiveModeRetirementExperiment',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveShowStrictFingerprintingMode',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '120.1.63.110',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveAutoTranslateStudy.json5 b/studies/BraveAutoTranslateStudy.json5
new file mode 100644
index 00000000..45b0b2be
--- /dev/null
+++ b/studies/BraveAutoTranslateStudy.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'BraveAutoTranslateStudy',
+    experiment: [
+      {
+        name: 'AutoTranslateDisabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveEnableAutoTranslate',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '107.1.47.31',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveCleanupSessionCookiesOnSessionRestore.json5 b/studies/BraveCleanupSessionCookiesOnSessionRestore.json5
new file mode 100644
index 00000000..91263bdf
--- /dev/null
+++ b/studies/BraveCleanupSessionCookiesOnSessionRestore.json5
@@ -0,0 +1,27 @@
+[
+  {
+    name: 'BraveCleanupSessionCookiesOnSessionRestore',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveCleanupSessionCookiesOnSessionRestore',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '111.1.50.0',
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'MAC',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveDebounceStudy.json5 b/studies/BraveDebounceStudy.json5
new file mode 100644
index 00000000..8fdbe144
--- /dev/null
+++ b/studies/BraveDebounceStudy.json5
@@ -0,0 +1,43 @@
+[
+  {
+    name: 'BraveDebounceStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveDebounce',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveDebounce',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '94.1.32.25',
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveFallbackDoHStudy.json5 b/studies/BraveFallbackDoHStudy.json5
new file mode 100644
index 00000000..30c254cd
--- /dev/null
+++ b/studies/BraveFallbackDoHStudy.json5
@@ -0,0 +1,37 @@
+[
+  {
+    name: 'BraveFallbackDoHStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 50,
+        feature_association: {
+          enable_feature: [
+            'BraveFallbackDoHProvider',
+          ],
+        },
+        param: [
+          {
+            name: 'BraveFallbackDoHProviderEndpoint',
+            value: 'quad9',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 50,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveFeedUpdateStudy.json5 b/studies/BraveFeedUpdateStudy.json5
new file mode 100644
index 00000000..cb369fde
--- /dev/null
+++ b/studies/BraveFeedUpdateStudy.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'BraveFeedUpdateStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveNewsFeedUpdate',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveForgetFirstPartyStorage.json5 b/studies/BraveForgetFirstPartyStorage.json5
new file mode 100644
index 00000000..940273e6
--- /dev/null
+++ b/studies/BraveForgetFirstPartyStorage.json5
@@ -0,0 +1,119 @@
+[
+  {
+    name: 'BraveForgetFirstPartyStorage',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '114.1.53.83',
+      channel: [
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'BraveForgetFirstPartyStorage',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '116.1.57.0',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'BraveForgetFirstPartyStorage',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveForgetFirstPartyStorage',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '112.1.51.57',
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveGoogleSignInPermissionStudy.json5 b/studies/BraveGoogleSignInPermissionStudy.json5
new file mode 100644
index 00000000..7dff42b5
--- /dev/null
+++ b/studies/BraveGoogleSignInPermissionStudy.json5
@@ -0,0 +1,81 @@
+[
+  {
+    name: 'BraveGoogleSignInPermissionStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveGoogleSignInPermission',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveGoogleSignInPermission',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '111.1.51.5',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'BraveGoogleSignInPermissionStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveGoogleSignInPermission',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveGoogleSignInPermission',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '111.1.51.5',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveHorizontalTabsUpdateEnabledStudy.json5 b/studies/BraveHorizontalTabsUpdateEnabledStudy.json5
new file mode 100644
index 00000000..024c37fb
--- /dev/null
+++ b/studies/BraveHorizontalTabsUpdateEnabledStudy.json5
@@ -0,0 +1,55 @@
+[
+  {
+    name: 'BraveHorizontalTabsUpdateEnabledStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveHorizontalTabsUpdate',
+          ],
+        },
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+  {
+    name: 'BraveHorizontalTabsUpdateEnabledStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveHorizontalTabsUpdate',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveLocalhostAccessPermissionStudy.json5 b/studies/BraveLocalhostAccessPermissionStudy.json5
new file mode 100644
index 00000000..5b0f2733
--- /dev/null
+++ b/studies/BraveLocalhostAccessPermissionStudy.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'BraveLocalhostAccessPermissionStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveLocalhostAccessPermission',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '115.1.55.5',
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveP3AConstellationEnabled.json5 b/studies/BraveP3AConstellationEnabled.json5
new file mode 100644
index 00000000..d657749d
--- /dev/null
+++ b/studies/BraveP3AConstellationEnabled.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveP3AConstellationEnabled',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveP3AConstellation',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveP3AJSONOtherDeprecation.json5 b/studies/BraveP3AJSONOtherDeprecation.json5
new file mode 100644
index 00000000..37928e4e
--- /dev/null
+++ b/studies/BraveP3AJSONOtherDeprecation.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'BraveP3AJSONOtherDeprecation',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveP3AOtherJSONDeprecation',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveP3ANebulaNightlyBeta.json5 b/studies/BraveP3ANebulaNightlyBeta.json5
new file mode 100644
index 00000000..519f989f
--- /dev/null
+++ b/studies/BraveP3ANebulaNightlyBeta.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveP3ANebulaNightlyBeta',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveP3ADifferentialSampling',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveP3ANebulaRelease.json5 b/studies/BraveP3ANebulaRelease.json5
new file mode 100644
index 00000000..1006d251
--- /dev/null
+++ b/studies/BraveP3ANebulaRelease.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'BraveP3ANebulaRelease',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveP3ADifferentialSampling',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveP3ATypicalJSONDeprecationEnabled.json5 b/studies/BraveP3ATypicalJSONDeprecationEnabled.json5
new file mode 100644
index 00000000..97378561
--- /dev/null
+++ b/studies/BraveP3ATypicalJSONDeprecationEnabled.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveP3ATypicalJSONDeprecationEnabled',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveP3ATypicalJSONDeprecation',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveRequestOTRTabRolloutStudy.json5 b/studies/BraveRequestOTRTabRolloutStudy.json5
new file mode 100644
index 00000000..9028d71e
--- /dev/null
+++ b/studies/BraveRequestOTRTabRolloutStudy.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'BraveRequestOTRTabRolloutStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveRequestOTRTab',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveRewardsAllowSelfCustodyProvidersStudy.json5 b/studies/BraveRewardsAllowSelfCustodyProvidersStudy.json5
new file mode 100644
index 00000000..a84f71c2
--- /dev/null
+++ b/studies/BraveRewardsAllowSelfCustodyProvidersStudy.json5
@@ -0,0 +1,29 @@
+[
+  {
+    name: 'BraveRewardsAllowSelfCustodyProvidersStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveRewardsAllowSelfCustodyProviders',
+          ],
+        },
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveRewardsWebUiPanelStudy.json5 b/studies/BraveRewardsWebUiPanelStudy.json5
new file mode 100644
index 00000000..2814a368
--- /dev/null
+++ b/studies/BraveRewardsWebUiPanelStudy.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveRewardsWebUiPanelStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveRewardsWebUIPanel',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '103.1.43.9',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveRoundTimeStampsStudy.json5 b/studies/BraveRoundTimeStampsStudy.json5
new file mode 100644
index 00000000..a4d1682b
--- /dev/null
+++ b/studies/BraveRoundTimeStampsStudy.json5
@@ -0,0 +1,35 @@
+[
+  {
+    name: 'BraveRoundTimeStampsStudy',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveRoundTimeStamps',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '125.*',
+      max_version: '130.1.72.75',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveScreenFingerprintingBlockerStudy.json5 b/studies/BraveScreenFingerprintingBlockerStudy.json5
new file mode 100644
index 00000000..d18d8b22
--- /dev/null
+++ b/studies/BraveScreenFingerprintingBlockerStudy.json5
@@ -0,0 +1,89 @@
+[
+  {
+    name: 'BraveScreenFingerprintingBlockerStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveBlockScreenFingerprinting',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '108.1.48.19',
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+  {
+    name: 'BraveScreenFingerprintingBlockerStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveBlockScreenFingerprinting',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '111.1.50.93',
+      channel: [
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+  {
+    name: 'BraveScreenFingerprintingBlockerStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveBlockScreenFingerprinting',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '111.1.50.93',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveSearchAdStudy.json5 b/studies/BraveSearchAdStudy.json5
new file mode 100644
index 00000000..9f73f9fa
--- /dev/null
+++ b/studies/BraveSearchAdStudy.json5
@@ -0,0 +1,67 @@
+[
+  {
+    name: 'BraveSearchAdStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ShouldLaunchBraveAdsAsInProcessService',
+            'ShouldAlwaysRunBraveAdsService',
+            'ShouldSupportSearchResultAds',
+            'ShouldAlwaysTriggerBraveSearchResultAdEvents',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'BraveSearchAdStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ShouldAlwaysRunBraveAdsService',
+            'ShouldSupportSearchResultAds',
+            'ShouldAlwaysTriggerBraveSearchResultAdEvents',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '122.1.65.32',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveSearchPromotionBannerStudy.json5 b/studies/BraveSearchPromotionBannerStudy.json5
new file mode 100644
index 00000000..f122b702
--- /dev/null
+++ b/studies/BraveSearchPromotionBannerStudy.json5
@@ -0,0 +1,77 @@
+[
+  {
+    name: 'BraveSearchPromotionBannerStudy',
+    experiment: [
+      {
+        name: 'banner_type_B',
+        probability_weight: 33,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_B',
+          },
+        ],
+      },
+      {
+        name: 'banner_type_C',
+        probability_weight: 33,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_C',
+          },
+        ],
+      },
+      {
+        name: 'banner_type_D',
+        probability_weight: 34,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_D',
+          },
+        ],
+      },
+    ],
+    filter: {
+      min_version: '117.1.60.41',
+      channel: [
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+      country: [
+        'CA',
+        'DE',
+        'FR',
+        'GB',
+        'US',
+        'AT',
+        'ES',
+        'MX',
+        'BR',
+        'AR',
+        'IN',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveSearchPromotionBannerStudyOnStable.json5 b/studies/BraveSearchPromotionBannerStudyOnStable.json5
new file mode 100644
index 00000000..eb2e15c2
--- /dev/null
+++ b/studies/BraveSearchPromotionBannerStudyOnStable.json5
@@ -0,0 +1,79 @@
+[
+  {
+    name: 'BraveSearchPromotionBannerStudyOnStable',
+    experiment: [
+      {
+        name: 'banner_type_B',
+        probability_weight: 2,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_B',
+          },
+        ],
+      },
+      {
+        name: 'banner_type_C',
+        probability_weight: 2,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_C',
+          },
+        ],
+      },
+      {
+        name: 'banner_type_D',
+        probability_weight: 2,
+        feature_association: {
+          enable_feature: [
+            'BraveSearchOmniboxBanner',
+          ],
+        },
+        param: [
+          {
+            name: 'banner_type',
+            value: 'type_D',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 94,
+      },
+    ],
+    filter: {
+      min_version: '117.1.60.41',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+      country: [
+        'CA',
+        'DE',
+        'FR',
+        'GB',
+        'AT',
+        'ES',
+        'MX',
+        'BR',
+        'AR',
+        'IN',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveTranslateStudy.json5 b/studies/BraveTranslateStudy.json5
new file mode 100644
index 00000000..2a5b6838
--- /dev/null
+++ b/studies/BraveTranslateStudy.json5
@@ -0,0 +1,36 @@
+[
+  {
+    name: 'BraveTranslateStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'UseBraveTranslateGo',
+            'Translate',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '104.1.43.54',
+      max_version: '106.1.45.44',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveWalletAnkrBalancesEnabled.json5 b/studies/BraveWalletAnkrBalancesEnabled.json5
new file mode 100644
index 00000000..da670a65
--- /dev/null
+++ b/studies/BraveWalletAnkrBalancesEnabled.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveWalletAnkrBalancesEnabled',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 0,
+        feature_association: {
+          enable_feature: [
+            'BraveWalletAnkrBalances',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 100,
+      },
+    ],
+    filter: {
+      min_version: '120.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveWebViewRoundedCornersStudy.json5 b/studies/BraveWebViewRoundedCornersStudy.json5
new file mode 100644
index 00000000..240ca6c3
--- /dev/null
+++ b/studies/BraveWebViewRoundedCornersStudy.json5
@@ -0,0 +1,27 @@
+[
+  {
+    name: 'BraveWebViewRoundedCornersStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'brave-web-view-rounded-corners',
+          ],
+        },
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveWebcompatExceptionsServiceReleaseStudy.json5 b/studies/BraveWebcompatExceptionsServiceReleaseStudy.json5
new file mode 100644
index 00000000..cf41a243
--- /dev/null
+++ b/studies/BraveWebcompatExceptionsServiceReleaseStudy.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'BraveWebcompatExceptionsServiceReleaseStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveWebcompatExceptionsService',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '128.1.69.150',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/BraveWebcompatExceptionsServiceStudy.json5 b/studies/BraveWebcompatExceptionsServiceStudy.json5
new file mode 100644
index 00000000..0b3fd820
--- /dev/null
+++ b/studies/BraveWebcompatExceptionsServiceStudy.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'BraveWebcompatExceptionsServiceStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveWebcompatExceptionsService',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '128.1.70.66',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/CanvasKillSwitches.json5 b/studies/CanvasKillSwitches.json5
new file mode 100644
index 00000000..2ff68695
--- /dev/null
+++ b/studies/CanvasKillSwitches.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'CanvasKillSwitches',
+    experiment: [
+      {
+        name: 'Disabled_EmergencyKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'Canvas2DHibernation',
+            'EvictionUnlocksResources',
+          ],
+        },
+      },
+    ],
+    filter: {
+      max_version: '125.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/ClampPlatformVersionClientHint.json5 b/studies/ClampPlatformVersionClientHint.json5
new file mode 100644
index 00000000..76783d22
--- /dev/null
+++ b/studies/ClampPlatformVersionClientHint.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'ClampPlatformVersionClientHint',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'ClampPlatformVersionClientHint',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '114.1.52.78',
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/CloseWatcher.json5 b/studies/CloseWatcher.json5
new file mode 100644
index 00000000..e2ad2112
--- /dev/null
+++ b/studies/CloseWatcher.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'CloseWatcher',
+    experiment: [
+      {
+        name: 'Disabled_EmergencyKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'CloseWatcher',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '120.*',
+      max_version: '122.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/CollectWebGPUSupportMetricsKillSwitch.json5 b/studies/CollectWebGPUSupportMetricsKillSwitch.json5
new file mode 100644
index 00000000..c2c7d35f
--- /dev/null
+++ b/studies/CollectWebGPUSupportMetricsKillSwitch.json5
@@ -0,0 +1,28 @@
+[
+  {
+    name: 'CollectWebGPUSupportMetricsKillSwitch',
+    experiment: [
+      {
+        name: 'Disabled_CollectWebGPUSupportMetrics',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'CollectWebGPUSupportMetrics',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '119.*',
+      max_version: '119.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/CookieListDefaultStudy.json5 b/studies/CookieListDefaultStudy.json5
new file mode 100644
index 00000000..ebf0acaf
--- /dev/null
+++ b/studies/CookieListDefaultStudy.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'CookieListDefaultStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockCookieListDefault',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/CosmeticFilteringChildFramesStudy.json5 b/studies/CosmeticFilteringChildFramesStudy.json5
new file mode 100644
index 00000000..5c36a183
--- /dev/null
+++ b/studies/CosmeticFilteringChildFramesStudy.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'CosmeticFilteringChildFramesStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockCosmeticFilteringChildFrames',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '106.1.46.14',
+      channel: [
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/CrossPlatformVPNStudy.json5 b/studies/CrossPlatformVPNStudy.json5
new file mode 100644
index 00000000..789665c8
--- /dev/null
+++ b/studies/CrossPlatformVPNStudy.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'CrossPlatformVPNStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveVPN',
+            'BraveVPNLinkSubscriptionAndroidUI',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '110.1.49.120',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/Default1pBlockingStudy.json5 b/studies/Default1pBlockingStudy.json5
new file mode 100644
index 00000000..e7523d27
--- /dev/null
+++ b/studies/Default1pBlockingStudy.json5
@@ -0,0 +1,81 @@
+[
+  {
+    name: 'Default1pBlockingStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 0,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockDefault1pBlocking',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveAdblockDefault1pBlocking',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '92.1.30.57',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'Default1pBlockingStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 0,
+        feature_association: {
+          enable_feature: [
+            'BraveAdblockDefault1pBlocking',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveAdblockDefault1pBlocking',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '92.1.30.57',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/DefaultBraveCommandsStudy.json5 b/studies/DefaultBraveCommandsStudy.json5
new file mode 100644
index 00000000..627d0b2e
--- /dev/null
+++ b/studies/DefaultBraveCommandsStudy.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'DefaultBraveCommandsStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveCommands',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/DefaultBraveOmniboxMoreHistoryStudy.json5 b/studies/DefaultBraveOmniboxMoreHistoryStudy.json5
new file mode 100644
index 00000000..763172d2
--- /dev/null
+++ b/studies/DefaultBraveOmniboxMoreHistoryStudy.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'DefaultBraveOmniboxMoreHistoryStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'HistoryMoreSearchResults',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/DefaultPassthroughCommandDecoderStudy.json5 b/studies/DefaultPassthroughCommandDecoderStudy.json5
new file mode 100644
index 00000000..9eae9995
--- /dev/null
+++ b/studies/DefaultPassthroughCommandDecoderStudy.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'DefaultPassthroughCommandDecoderStudy',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'DefaultPassthroughCommandDecoder',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '125.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/DefaultPlaylistStudy.json5 b/studies/DefaultPlaylistStudy.json5
new file mode 100644
index 00000000..8ec1071f
--- /dev/null
+++ b/studies/DefaultPlaylistStudy.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'DefaultPlaylistStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'Playlist',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/DisableCnameUncloakingForAndroid.json5 b/studies/DisableCnameUncloakingForAndroid.json5
new file mode 100644
index 00000000..14cef9e0
--- /dev/null
+++ b/studies/DisableCnameUncloakingForAndroid.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'DisableCnameUncloakingForAndroid',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'BraveAdblockCnameUncloaking',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/DisableReduceLanguage.json5 b/studies/DisableReduceLanguage.json5
new file mode 100644
index 00000000..1189650b
--- /dev/null
+++ b/studies/DisableReduceLanguage.json5
@@ -0,0 +1,38 @@
+[
+  {
+    name: 'DisableReduceLanguage',
+    experiment: [
+      {
+        name: 'Default',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveReduceLanguage',
+          ],
+        },
+      },
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveReduceLanguage',
+          ],
+        },
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/EphemeralStorageStudy.json5 b/studies/EphemeralStorageStudy.json5
new file mode 100644
index 00000000..2b1e6650
--- /dev/null
+++ b/studies/EphemeralStorageStudy.json5
@@ -0,0 +1,81 @@
+[
+  {
+    name: 'EphemeralStorageStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'EphemeralStorage',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'EphemeralStorage',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '89.1.21.73',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+  {
+    name: 'EphemeralStorageStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'EphemeralStorage',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'EphemeralStorage',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '89.1.21.73',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/ExtensionsManifestV2Study.json5 b/studies/ExtensionsManifestV2Study.json5
new file mode 100644
index 00000000..4ca4b5be
--- /dev/null
+++ b/studies/ExtensionsManifestV2Study.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'ExtensionsManifestV2Study',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ExtensionsManifestV2',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '125.1.68.25',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/ExtensionsManifestV2StudyRelease.json5 b/studies/ExtensionsManifestV2StudyRelease.json5
new file mode 100644
index 00000000..0dc3738b
--- /dev/null
+++ b/studies/ExtensionsManifestV2StudyRelease.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'ExtensionsManifestV2StudyRelease',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ExtensionsManifestV2',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '125.1.68.25',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/HangWatcher.json5 b/studies/HangWatcher.json5
new file mode 100644
index 00000000..cf8d018e
--- /dev/null
+++ b/studies/HangWatcher.json5
@@ -0,0 +1,57 @@
+[
+  {
+    name: 'HangWatcher',
+    experiment: [
+      {
+        name: 'HangWatcherEnableDumps',
+        probability_weight: 50,
+        feature_association: {
+          enable_feature: [
+            'EnableHangWatcher',
+          ],
+        },
+        param: [
+          {
+            name: 'ui_thread_log_level',
+            value: '2',
+          },
+          {
+            name: 'io_thread_log_level',
+            value: '2',
+          },
+          {
+            name: 'renderer_process_main_thread_log_level',
+            value: '2',
+          },
+          {
+            name: 'renderer_process_io_thread_log_level',
+            value: '2',
+          },
+          {
+            name: 'utility_process_main_thread_log_level',
+            value: '2',
+          },
+          {
+            name: 'utility_process_io_thread_log_level',
+            value: '2',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 50,
+      },
+    ],
+    filter: {
+      min_version: '97.1.36.14',
+      channel: [
+        'NIGHTLY',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/HeapProfilingMacKillSwitch.json5 b/studies/HeapProfilingMacKillSwitch.json5
new file mode 100644
index 00000000..a9754972
--- /dev/null
+++ b/studies/HeapProfilingMacKillSwitch.json5
@@ -0,0 +1,28 @@
+[
+  {
+    name: 'HeapProfilingMacKillSwitch',
+    experiment: [
+      {
+        name: 'Disabled_EmergencyKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'HeapProfilerReporting',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '122.*',
+      max_version: '125.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'MAC',
+      ],
+    },
+  },
+]
diff --git a/studies/InnerHTMLParserFastpathStudy.json5 b/studies/InnerHTMLParserFastpathStudy.json5
new file mode 100644
index 00000000..6ee1a353
--- /dev/null
+++ b/studies/InnerHTMLParserFastpathStudy.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'InnerHTMLParserFastpathStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'InnerHTMLParserFastpath',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      max_version: '114.1.52.999',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/MacCoreLocationBackendStudy.json5 b/studies/MacCoreLocationBackendStudy.json5
new file mode 100644
index 00000000..f2f18edc
--- /dev/null
+++ b/studies/MacCoreLocationBackendStudy.json5
@@ -0,0 +1,40 @@
+[
+  {
+    name: 'MacCoreLocationBackendStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'MacCoreLocationBackend',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'MacCoreLocationBackend',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '91.1.26.74',
+      channel: [
+        'RELEASE',
+        'BETA',
+        'NIGHTLY',
+      ],
+      platform: [
+        'MAC',
+      ],
+    },
+  },
+]
diff --git a/studies/MetricsAndCrashSampling.json5 b/studies/MetricsAndCrashSampling.json5
new file mode 100644
index 00000000..69284658
--- /dev/null
+++ b/studies/MetricsAndCrashSampling.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'MetricsAndCrashSampling',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'MetricsReporting',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/ModuleFileNamePatchStudy.json5 b/studies/ModuleFileNamePatchStudy.json5
new file mode 100644
index 00000000..24b1bed8
--- /dev/null
+++ b/studies/ModuleFileNamePatchStudy.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'ModuleFileNamePatchStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'ModuleFileNamePatch',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '112.1.51.89',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+      ],
+    },
+  },
+]
diff --git a/studies/ModuleFileNamePatchStudyRelease.json5 b/studies/ModuleFileNamePatchStudyRelease.json5
new file mode 100644
index 00000000..941e0240
--- /dev/null
+++ b/studies/ModuleFileNamePatchStudyRelease.json5
@@ -0,0 +1,29 @@
+[
+  {
+    name: 'ModuleFileNamePatchStudyRelease',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 15,
+        feature_association: {
+          enable_feature: [
+            'ModuleFileNamePatch',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 85,
+      },
+    ],
+    filter: {
+      min_version: '112.1.51.89',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+      ],
+    },
+  },
+]
diff --git a/studies/NavigationThreadingOptimizationsCompatOldVersions.json5 b/studies/NavigationThreadingOptimizationsCompatOldVersions.json5
new file mode 100644
index 00000000..fed3af11
--- /dev/null
+++ b/studies/NavigationThreadingOptimizationsCompatOldVersions.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'NavigationThreadingOptimizationsCompatOldVersions',
+    experiment: [
+      {
+        name: 'Disabled',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'NavigationThreadingOptimizations',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      max_version: '102.1.39.0',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/NewiOSPlaylistUIStudy.json5 b/studies/NewiOSPlaylistUIStudy.json5
new file mode 100644
index 00000000..82d27114
--- /dev/null
+++ b/studies/NewiOSPlaylistUIStudy.json5
@@ -0,0 +1,29 @@
+[
+  {
+    name: 'NewiOSPlaylistUIStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'NewPlaylistUI',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'IOS',
+      ],
+    },
+  },
+]
diff --git a/studies/PartitionedCookies.json5 b/studies/PartitionedCookies.json5
new file mode 100644
index 00000000..3ef1b5a8
--- /dev/null
+++ b/studies/PartitionedCookies.json5
@@ -0,0 +1,34 @@
+[
+  {
+    name: 'PartitionedCookies',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'PartitionedCookies',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '122.1.63.0',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/PostFREFixMetricsAndCrashSampling.json5 b/studies/PostFREFixMetricsAndCrashSampling.json5
new file mode 100644
index 00000000..df97f75e
--- /dev/null
+++ b/studies/PostFREFixMetricsAndCrashSampling.json5
@@ -0,0 +1,30 @@
+[
+  {
+    name: 'PostFREFixMetricsAndCrashSampling',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'PostFREFixMetricsReporting',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/PrettyPrintJSONDocument.json5 b/studies/PrettyPrintJSONDocument.json5
new file mode 100644
index 00000000..8405a13c
--- /dev/null
+++ b/studies/PrettyPrintJSONDocument.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'PrettyPrintJSONDocument',
+    experiment: [
+      {
+        name: 'Disabled_EmergencyKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'PrettyPrintJSONDocument',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '117.0.0.0',
+      max_version: '119.1.61.0',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/PrivateNetworkAccessKillswitch.json5 b/studies/PrivateNetworkAccessKillswitch.json5
new file mode 100644
index 00000000..1f539d11
--- /dev/null
+++ b/studies/PrivateNetworkAccessKillswitch.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'PrivateNetworkAccessKillswitch',
+    experiment: [
+      {
+        name: 'Disabled_PrivateNetworkAccessKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'PrivateNetworkAccessForNavigations',
+            'PrivateNetworkAccessForNavigationsWarningOnly',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '123.*',
+      max_version: '125.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/RendererAllocatesImagesKillSwitch.json5 b/studies/RendererAllocatesImagesKillSwitch.json5
new file mode 100644
index 00000000..8b514ed8
--- /dev/null
+++ b/studies/RendererAllocatesImagesKillSwitch.json5
@@ -0,0 +1,28 @@
+[
+  {
+    name: 'RendererAllocatesImagesKillSwitch',
+    experiment: [
+      {
+        name: 'Disabled_RendererAllocatesImages',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'RendererAllocatesImages',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '122.*',
+      max_version: '124.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'MAC',
+      ],
+    },
+  },
+]
diff --git a/studies/SidebarEnabledStudy.json5 b/studies/SidebarEnabledStudy.json5
new file mode 100644
index 00000000..9be18c92
--- /dev/null
+++ b/studies/SidebarEnabledStudy.json5
@@ -0,0 +1,43 @@
+[
+  {
+    name: 'SidebarEnabledStudy',
+    experiment: [
+      {
+        name: 'group_A',
+        probability_weight: 2,
+        feature_association: {
+          enable_feature: [
+            'SidebarShowAlwaysOnStable',
+          ],
+        },
+      },
+      {
+        name: 'group_B',
+        probability_weight: 2,
+        feature_association: {
+          enable_feature: [
+            'SidebarShowAlwaysOnStable',
+          ],
+        },
+        param: [
+          {
+            name: 'open_one_shot_leo_panel',
+            value: 'true',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 96,
+      },
+    ],
+    filter: {
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+      ],
+    },
+  },
+]
diff --git a/studies/SmilAutoSuspendOnLagKillSwitch.json5 b/studies/SmilAutoSuspendOnLagKillSwitch.json5
new file mode 100644
index 00000000..5a2d7de1
--- /dev/null
+++ b/studies/SmilAutoSuspendOnLagKillSwitch.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'SmilAutoSuspendOnLagKillSwitch',
+    experiment: [
+      {
+        name: 'Disabled_EmergencyKillSwitch',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'SmilAutoSuspendOnLag',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '118.*',
+      max_version: '120.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/Speedreader TTS.json5 b/studies/Speedreader TTS.json5
new file mode 100644
index 00000000..7bb072ea
--- /dev/null
+++ b/studies/Speedreader TTS.json5	
@@ -0,0 +1,37 @@
+[
+  {
+    name: 'Speedreader TTS',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'Speedreader',
+          ],
+        },
+        param: [
+          {
+            name: 'tts',
+            value: 'true',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+      ],
+    },
+  },
+]
diff --git a/studies/UndecryptablePasswords.json5 b/studies/UndecryptablePasswords.json5
new file mode 100644
index 00000000..24267b24
--- /dev/null
+++ b/studies/UndecryptablePasswords.json5
@@ -0,0 +1,33 @@
+[
+  {
+    name: 'UndecryptablePasswords',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'SkipUndecryptablePasswords',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '127.1.68.107',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/UseWritePixelsYUV.json5 b/studies/UseWritePixelsYUV.json5
new file mode 100644
index 00000000..6bb457ec
--- /dev/null
+++ b/studies/UseWritePixelsYUV.json5
@@ -0,0 +1,31 @@
+[
+  {
+    name: 'UseWritePixelsYUV',
+    experiment: [
+      {
+        name: 'Disabled_UseWritePixelsYUV',
+        probability_weight: 100,
+        feature_association: {
+          disable_feature: [
+            'UseWritePixelsYUV',
+          ],
+        },
+      },
+    ],
+    filter: {
+      min_version: '123.*',
+      max_version: '125.*',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+        'ANDROID',
+      ],
+    },
+  },
+]
diff --git a/studies/UserActivityStudy.json5 b/studies/UserActivityStudy.json5
new file mode 100644
index 00000000..61948c38
--- /dev/null
+++ b/studies/UserActivityStudy.json5
@@ -0,0 +1,51 @@
+[
+  {
+    name: 'UserActivityStudy',
+    experiment: [
+      {
+        name: 'Triggers',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'UserActivity',
+          ],
+        },
+        param: [
+          {
+            name: 'triggers',
+            value: '0D0B14110D0B14110D0B14110D0B1411=-1.0;0D0B1411070707=-1.0;07070707=-1.0;0B1512=0.5;0B1513=0.5;0B1514=0.5;06=1.0;04=0.5',
+          },
+          {
+            name: 'time_window',
+            value: '1h',
+          },
+          {
+            name: 'threshold',
+            value: '0.5',
+          },
+          {
+            name: 'idle_time_threshold',
+            value: '5s',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '108.1.47.73',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/WhatsNewStudy.json5 b/studies/WhatsNewStudy.json5
new file mode 100644
index 00000000..72b20d93
--- /dev/null
+++ b/studies/WhatsNewStudy.json5
@@ -0,0 +1,32 @@
+[
+  {
+    name: 'WhatsNewStudy',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        param: [
+          {
+            name: 'target_major_version_stable',
+            value: '1.65',
+          },
+        ],
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '119.1.60.114',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+        'MAC',
+        'LINUX',
+      ],
+    },
+  },
+]
diff --git a/studies/WorkaroundNewWindowFlash.json5 b/studies/WorkaroundNewWindowFlash.json5
new file mode 100644
index 00000000..7d47f250
--- /dev/null
+++ b/studies/WorkaroundNewWindowFlash.json5
@@ -0,0 +1,75 @@
+[
+  {
+    name: 'WorkaroundNewWindowFlash',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveWorkaroundNewWindowFlash',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveWorkaroundNewWindowFlash',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '127.1.70.49',
+      channel: [
+        'NIGHTLY',
+        'BETA',
+      ],
+      platform: [
+        'WINDOWS',
+      ],
+    },
+  },
+  {
+    name: 'WorkaroundNewWindowFlash',
+    experiment: [
+      {
+        name: 'Enabled',
+        probability_weight: 100,
+        feature_association: {
+          enable_feature: [
+            'BraveWorkaroundNewWindowFlash',
+          ],
+        },
+      },
+      {
+        name: 'Disabled',
+        probability_weight: 0,
+        feature_association: {
+          disable_feature: [
+            'BraveWorkaroundNewWindowFlash',
+          ],
+        },
+      },
+      {
+        name: 'Default',
+        probability_weight: 0,
+      },
+    ],
+    filter: {
+      min_version: '127.1.70.49',
+      channel: [
+        'RELEASE',
+      ],
+      platform: [
+        'WINDOWS',
+      ],
+    },
+  },
+]