diff --git a/.changeset/tame-badgers-drum.md b/.changeset/tame-badgers-drum.md
new file mode 100644
index 00000000000..b7d293b64f8
--- /dev/null
+++ b/.changeset/tame-badgers-drum.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Fix popup and window auth modes conflicting on firefox
diff --git a/packages/thirdweb/src/wallets/in-app/core/wallet/index.ts b/packages/thirdweb/src/wallets/in-app/core/wallet/index.ts
index ce72a591ecf..748d790759b 100644
--- a/packages/thirdweb/src/wallets/in-app/core/wallet/index.ts
+++ b/packages/thirdweb/src/wallets/in-app/core/wallet/index.ts
@@ -40,7 +40,9 @@ export async function connectInAppWallet(
   connector: InAppConnector,
 ): Promise<[Account, Chain]> {
   if (
+    // if auth mode is not specified, the default is popup
     createOptions?.auth?.mode !== "popup" &&
+    createOptions?.auth?.mode !== undefined &&
     connector.authenticateWithRedirect
   ) {
     const strategy = options.strategy;