diff --git a/.changeset/shy-trees-divide.md b/.changeset/shy-trees-divide.md
new file mode 100644
index 00000000000..8bc7b66e887
--- /dev/null
+++ b/.changeset/shy-trees-divide.md
@@ -0,0 +1,6 @@
+---
+"firebase": major
+"@firebase/firestore": major
+---
+
+Removed depreacted `experimentalTabSynchronization` settings. To enable multi-tab sychronization, use `synchronizeTabs` instead.
diff --git a/packages/firebase/index.d.ts b/packages/firebase/index.d.ts
index 01e76372722..3dbef9e2c19 100644
--- a/packages/firebase/index.d.ts
+++ b/packages/firebase/index.d.ts
@@ -1813,7 +1813,7 @@ declare namespace firebase.functions {
     /**
      * Changes this instance to point to a Cloud Functions emulator running
      * locally. See https://firebase.google.com/docs/functions/local-emulator
-     * 
+     *
      * @deprecated Prefer the useEmulator(host, port) method.
      * @param origin The origin of the local emulator, such as
      * "http://localhost:5005".
@@ -3132,10 +3132,10 @@ declare namespace firebase.auth {
      */
     useDeviceLanguage(): void;
     /**
-     * Modify this Auth instance to communicate with the Firebase Auth emulator.  This must be 
+     * Modify this Auth instance to communicate with the Firebase Auth emulator.  This must be
      * called synchronously immediately following the first call to `firebase.auth()`.  Do not use
      * with production credentials as emulator traffic is not encrypted.
-     * 
+     *
      * @param url The URL at which the emulator is running (eg, 'http://localhost:9099')
      */
     useEmulator(url: string): void;
@@ -7954,17 +7954,6 @@ declare namespace firebase.firestore {
      */
     synchronizeTabs?: boolean;
 
-    /**
-     * Whether to synchronize the in-memory state of multiple tabs. Setting this
-     * to `true` in all open tabs enables shared access to local persistence,
-     * shared execution of queries and latency-compensated local document updates
-     * across all connected instances.
-     *
-     * @deprecated This setting is deprecated. To enable synchronization between
-     * multiple tabs, please use `synchronizeTabs: true` instead.
-     */
-    experimentalTabSynchronization?: boolean;
-
     /**
      * Whether to force enable persistence for the client. This cannot be used
      * with `synchronizeTabs:true` and is primarily intended for use with Web
diff --git a/packages/firestore/src/api/database.ts b/packages/firestore/src/api/database.ts
index c9912e81a9f..9ac0a2e27e3 100644
--- a/packages/firestore/src/api/database.ts
+++ b/packages/firestore/src/api/database.ts
@@ -159,6 +159,7 @@ export const CACHE_SIZE_UNLIMITED = LruParams.COLLECTION_DISABLED;
 
 // enablePersistence() defaults:
 const DEFAULT_SYNCHRONIZE_TABS = false;
+const DEFAULT_FORCE_OWNING_TAB = false;
 
 /** Undocumented, private additional settings not exposed in our public API. */
 interface PrivateSettings extends PublicSettings {
@@ -461,26 +462,16 @@ export class Firestore implements PublicFirestore, FirebaseService {
     let experimentalForceOwningTab = false;
 
     if (settings) {
-      if (settings.experimentalTabSynchronization !== undefined) {
-        logError(
-          "The 'experimentalTabSynchronization' setting will be removed. Use 'synchronizeTabs' instead."
-        );
-      }
-      synchronizeTabs =
-        settings.synchronizeTabs ??
-        settings.experimentalTabSynchronization ??
-        DEFAULT_SYNCHRONIZE_TABS;
-
-      experimentalForceOwningTab = settings.experimentalForceOwningTab
-        ? settings.experimentalForceOwningTab
-        : false;
+      synchronizeTabs = settings.synchronizeTabs ?? DEFAULT_SYNCHRONIZE_TABS;
+      experimentalForceOwningTab =
+        settings.experimentalForceOwningTab ?? DEFAULT_FORCE_OWNING_TAB;
 
-      if (synchronizeTabs && experimentalForceOwningTab) {
-        throw new FirestoreError(
-          Code.INVALID_ARGUMENT,
-          "The 'experimentalForceOwningTab' setting cannot be used with 'synchronizeTabs'."
-        );
-      }
+      validateIsNotUsedTogether(
+        'synchronizeTabs',
+        synchronizeTabs,
+        'experimentalForceOwningTab',
+        experimentalForceOwningTab
+      );
     }
 
     return this.configureClient(