Update setting-default.md (#152)

Added note about Opera no longer allowing alternative search engines.

docs/kagi/getting-started/setting-default.md

@@ -2,12 +2,13 @@
 
 ## Table of Contents
 
-- [Option 0: Use Orion browser by Kagi (currently for macOS/iOS only)](#orion)
-- [Option 1: Using the Kagi Browser Extension](#browser_extension)
+- [Option 1: Use Orion browser by Kagi (currently for macOS/iOS only)](#orion)
+- [Option 2: Using the Kagi Browser Extension](#browser_extension)
   - [Access to Safari Browsing History](#safari_extension)
   - [Note for Brave Browser Users](#brave_extension)
-- [Option 2: Manual Configuration](#manual_configuration)
-  - [Chromium-Based Browsers (Chrome, Edge, Brave, Opera, Vivaldi...)](#chromium_browsers)
+  - [Note for Opera Browser Users](#opera_extension)
+- [Option 3: Manual Configuration](#manual_configuration)
+  - [Chromium-Based Browsers (Chrome, Edge, Brave, Vivaldi, Arc...)](#chromium_browsers)
     - [Desktop](#chromium_desktop)
     - [Mobile](#chromium_mobile)
   - [Firefox-Based Browsers](#firefox_browsers)
@@ -25,20 +26,20 @@
 
 
 <a name="orion"></a>
-## Option 0: Use Orion browser by Kagi (currently for macOS/iOS only) {#orion}
+## Option 1: Use Orion browser by Kagi (currently for macOS/iOS only) {#orion}
 
 If you use Apple devices with macOS/iOS/iPadOS you can use Orion browser by Kagi. It has Kagi built-in and is the easiest option to start using Kagi.
 
 [Download Orion](https://browser.kagi.com).
 
 <a name="browser_extension"></a>
-## Option 1: Using the Kagi Browser Extension {#browser_extension}
+## Option 2: Using the Kagi Browser Extension {#browser_extension}
 
 Kagi is available as an extension for all major browsers. The extension sets Kagi as the default search engine and allows you to **search with Kagi even in a private window without logging in** (this can be also set manually with the use of a [private session link](https://help.kagi.com/kagi/getting-started/setting-default.html#private_session).
 
 Extension download links:
 
-- [Chromium-based browsers](https://chrome.google.com/webstore/detail/cdglnehniifkbagbbombnjghhcihifij) (Chrome, Edge, Brave, Opera, Vivaldi...)
+- [Chromium-based browsers](https://chrome.google.com/webstore/detail/cdglnehniifkbagbbombnjghhcihifij) (Chrome, Edge, Brave, Vivaldi, Arc...)
 - [Firefox-based browsers](https://addons.mozilla.org/en-US/firefox/addon/kagi-search-for-firefox/)
   - If you use Firefox on Android, check out [this guide](https://blog.mozilla.org/addons/2020/09/29/expanded-extension-support-in-firefox-for-android-nightly/). Android doesn't set Kagi as the default search engine, but it allows search in private mode to work normally.
   - After installing the extension, go to the extension settings (click the puzzle piece in the top right corner of the browser window) for Kagi and enter your [private session token URL](#private_session) to be logged in automatically even when cookies have been deleted.
@@ -66,16 +67,21 @@ In addition to installing the Kagi Browser Extension, Brave users must also make
 2. Turn on the "Index other search engines" option.
 
 
+<a name="opera_extension"></a>
+### Note for Opera Users: No Longer Compatible {#opera_extension}
+
+Opera is no longer compatible as it is restricting users from using alternative search engines. If you are an Opera user you can [reach out to Opera](https://opera.atlassian.net/servicedesk/customer/portal/9) and request them to add Kagi to their list of search engines.
+
 <a name="manual_configuration"></a>
-## Option 2: Manual Configuration {#manual_configuration}
+## Option 3: Manual Configuration {#manual_configuration}
 
 You can configure your web browser manually to use Kagi as its default search engine.
 
 If you are interested in using Kagi in private (incognito) browser windows, be sure to check our section on [private session tokens​](https://help.kagi.com/kagi/getting-started/setting-default.html#private_session).
 
 
 <a name="chromium_browsers"></a>
-### Chromium-Based Browsers (Chrome, Edge, Brave, Opera, Vivaldi...) {#chromium_browsers}
+### Chromium-Based Browsers (Chrome, Edge, Brave, Vivaldi, Arc...) {#chromium_browsers}
 
 
 <a name="chromium_desktop"></a>
@@ -89,6 +95,8 @@ If you are interested in using Kagi in private (incognito) browser windows, be s
 3. Click the three dots.
 4. Click **Make default**.
 
+Note: Opera is no longer compatible as it is restricting users from using alternative search engines. If you are an Opera user you can [reach out to Opera](https://opera.atlassian.net/servicedesk/customer/portal/9) and request them to add Kagi to their list of search engines.
+
 <img src="./media/kagi_default_chrome.jpg" width="675" alt="Setting Kagi as Default Search Engine in Chrome"><br />