diff --git a/app/metrics.yaml b/app/metrics.yaml
index 8fdaa751a..26e285963 100644
--- a/app/metrics.yaml
+++ b/app/metrics.yaml
@@ -223,6 +223,32 @@ events:
     notification_emails:
       - fenix-core@mozilla.com
     expires: "2021-07-01"
+  default_browser_changed:
+    type: event
+    description: |
+      Indicates the default browser was changed
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/18857
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/18895
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-10-01"
+  toolbar_menu_visible:
+    type: event
+    description: |
+      The browser menu was displayed from toolbar menu
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/18855
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/18895
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-10-01"
   total_uri_count:
     type: counter
     description: |
@@ -561,6 +587,20 @@ search_shortcuts:
       - fenix-core@mozilla.com
     expires: "2021-08-01"
 
+experiments_default_browser:
+  toolbar_menu_clicked:
+    type: event
+    description: |
+      Set default browser was clicked from toolbar menu
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/18851
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/18895
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-10-01"
 toolbar_settings:
   changed_position:
     type: event
diff --git a/app/src/main/java/org/mozilla/fenix/components/metrics/Event.kt b/app/src/main/java/org/mozilla/fenix/components/metrics/Event.kt
index 9ce81806a..f0dac803b 100644
--- a/app/src/main/java/org/mozilla/fenix/components/metrics/Event.kt
+++ b/app/src/main/java/org/mozilla/fenix/components/metrics/Event.kt
@@ -228,6 +228,8 @@ sealed class Event {
     // Set default browser experiment metrics
     object SetDefaultBrowserClicked : Event()
     object CloseExperimentCardClicked : Event()
+    object ToolbarMenuShown : Event()
+    object SetDefaultBrowserToolbarMenuClicked : Event()
 
     // Home menu interaction
     object HomeMenuSettingsItemClicked : Event()
diff --git a/app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt b/app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt
index 90dd026d2..83a1f97f4 100644
--- a/app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt
+++ b/app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt
@@ -32,6 +32,7 @@ import org.mozilla.fenix.GleanMetrics.DownloadsMisc
 import org.mozilla.fenix.GleanMetrics.DownloadsManagement
 import org.mozilla.fenix.GleanMetrics.ErrorPage
 import org.mozilla.fenix.GleanMetrics.Events
+import org.mozilla.fenix.GleanMetrics.ExperimentsDefaultBrowser
 import org.mozilla.fenix.GleanMetrics.FindInPage
 import org.mozilla.fenix.GleanMetrics.History
 import org.mozilla.fenix.GleanMetrics.HomeMenu
@@ -195,6 +196,15 @@ private val Event.wrapper: EventWrapper<*>?
             { Events.browserMenuAction.record(it) },
             { Events.browserMenuActionKeys.valueOf(it) }
         )
+        is Event.SetDefaultBrowserToolbarMenuClicked -> EventWrapper<NoExtraKeys>(
+            { ExperimentsDefaultBrowser.toolbarMenuClicked.record(it) }
+        )
+        is Event.ToolbarMenuShown -> EventWrapper<NoExtraKeys>(
+            { Events.toolbarMenuVisible.record(it) }
+        )
+        is Event.ChangedToDefaultBrowser -> EventWrapper<NoExtraKeys>(
+            { Events.defaultBrowserChanged.record(it) }
+        )
         is Event.OpenedBookmark -> EventWrapper<NoExtraKeys>(
             { BookmarksManagement.open.record(it) }
         )
@@ -838,7 +848,6 @@ private val Event.wrapper: EventWrapper<*>?
         is Event.FennecToFenixMigrated -> null
         is Event.AddonInstalled -> null
         is Event.SearchWidgetInstalled -> null
-        is Event.ChangedToDefaultBrowser -> null
         is Event.SyncAuthFromSharedReuse, Event.SyncAuthFromSharedCopy -> null
     }
 
diff --git a/app/src/main/java/org/mozilla/fenix/components/metrics/MetricController.kt b/app/src/main/java/org/mozilla/fenix/components/metrics/MetricController.kt
index 181ff4ea2..b27463267 100644
--- a/app/src/main/java/org/mozilla/fenix/components/metrics/MetricController.kt
+++ b/app/src/main/java/org/mozilla/fenix/components/metrics/MetricController.kt
@@ -179,7 +179,7 @@ internal class ReleaseMetricController(
         }
 
         Component.BROWSER_TOOLBAR to ToolbarFacts.Items.MENU -> {
-            metadata?.get("customTab")?.let { Event.CustomTabsMenuOpened }
+            metadata?.get("customTab")?.let { Event.CustomTabsMenuOpened } ?: Event.ToolbarMenuShown
         }
         Component.BROWSER_MENU to BrowserMenuFacts.Items.WEB_EXTENSION_MENU_ITEM -> {
             metadata?.get("id")?.let { Event.AddonsOpenInToolbarMenu(it.toString()) }
diff --git a/app/src/main/java/org/mozilla/fenix/components/toolbar/BrowserToolbarMenuController.kt b/app/src/main/java/org/mozilla/fenix/components/toolbar/BrowserToolbarMenuController.kt
index a21989c7e..a3ec715ac 100644
--- a/app/src/main/java/org/mozilla/fenix/components/toolbar/BrowserToolbarMenuController.kt
+++ b/app/src/main/java/org/mozilla/fenix/components/toolbar/BrowserToolbarMenuController.kt
@@ -347,6 +347,7 @@ class DefaultBrowserToolbarMenuController(
                 )
             }
             is ToolbarMenu.Item.SetDefaultBrowser -> {
+                metrics.track(Event.SetDefaultBrowserToolbarMenuClicked)
                 activity.openSetDefaultBrowserOption()
             }
         }
diff --git a/docs/metrics.md b/docs/metrics.md
index f8a40e346..0b80657d2 100644
--- a/docs/metrics.md
+++ b/docs/metrics.md
@@ -133,6 +133,7 @@ In addition to those built-in metrics, the following metrics are added to the pi
 | events.app_received_intent |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |The system received an Intent for the HomeActivity. An intent is received an external entity wants to the app to display content. Intents can be received when the app is closed – at which point the app will be opened – or when the app is already opened – at which point the already open app will make changes such as loading a url. This can be used loosely as a heuristic for when the user requested to open the app. The HomeActivity encompasses the home screen and browser screen but may include other screens. This differs from the app_opened probe because it measures all startups, not just cold startup.  |[mozilla-mobile/fenix#11940/](https://github.com/mozilla-mobile/fenix/pull/11940/), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>source: The method used to open Fenix. Possible values are `app_icon`, `custom_tab`, `link` or `unknown` </li></ul>|2021-06-01 | |
 | events.browser_menu_action |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A browser menu item was tapped  |[mozilla-mobile/fenix#1214](https://github.com/mozilla-mobile/fenix/pull/1214#issue-264756708), [mozilla-mobile/fenix#5098](https://github.com/mozilla-mobile/fenix/pull/5098#issuecomment-529658996), [mozilla-mobile/fenix#6310](https://github.com/mozilla-mobile/fenix/pull/6310), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>item: A string containing the name of the item the user tapped. These items include:    Settings, Help, Desktop Site toggle on/off, Find in Page,   New Tab, Private Tab, Share, Report Site Issue, Back/Forward button,   Reload Button, Quit, Reader Mode On, Reader Mode Off, Open In app,   Add To Top Sites, Add-ons Manager, Bookmarks, History </li></ul>|2021-07-01 |2 |
 | events.copy_url_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |An event that indicates that a user has selected copy option when long pressing on url bar.  |[mozilla-mobile/fenix#16915](https://github.com/mozilla-mobile/fenix/pull/16915)||2021-05-10 |2 |
+| events.default_browser_changed |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |Indicates the default browser was changed  |[mozilla-mobile/fenix#18895](https://github.com/mozilla-mobile/fenix/pull/18895)||2021-10-01 |2 |
 | events.entered_url |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user entered a url  |[mozilla-mobile/fenix#1067](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>autocomplete: A boolean that tells us whether the URL was autofilled by an Autocomplete suggestion </li></ul>|2021-07-01 |2 |
 | events.opened_link |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened a link with Fenix  |[mozilla-mobile/fenix#5975](https://github.com/mozilla-mobile/fenix/pull/5975), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>mode: The mode the link was opened in. Either 'PRIVATE' or 'NORMAL'. N.B.: this probe may be incorrectly implemented: see https://github.com/mozilla-mobile/fenix/issues/14133 </li></ul>|2021-07-01 |2 |
 | events.performed_search |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user performed a search  |[mozilla-mobile/fenix#1067](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673), [mozilla-mobile/fenix#1677](https://github.com/mozilla-mobile/fenix/pull/1677), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>source: A string that tells us how the user performed the search. Possible values are:  * default.action * default.suggestion * shortcut.action * shortcut.suggestion </li></ul>|2021-07-01 |2 |
@@ -141,7 +142,9 @@ In addition to those built-in metrics, the following metrics are added to the pi
 | events.search_bar_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user tapped the search bar  |[mozilla-mobile/fenix#1067](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>source: The view the user was on when they initiated the search (For example: `Home` or `Browser`) </li></ul>|2021-07-01 |2 |
 | events.synced_tab_opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |An event that indicates that a synced tab was opened.  |[mozilla-mobile/fenix#16727](https://github.com/mozilla-mobile/fenix/pull/16727)||2021-05-10 |2 |
 | events.tab_counter_menu_action |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A tab counter menu item was tapped |[mozilla-mobile/fenix#11533](https://github.com/mozilla-mobile/fenix/pull/11533), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)|<ul><li>item: A string containing the name of the item the user tapped. These items are:    New tab, New private tab, Close tab </li></ul>|2021-07-01 |2 |
+| events.toolbar_menu_visible |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |The browser menu was displayed from toolbar menu  |[mozilla-mobile/fenix#18895](https://github.com/mozilla-mobile/fenix/pull/18895)||2021-10-01 |2 |
 | events.whats_new_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the "what's new" page button  |[mozilla-mobile/fenix#5090](https://github.com/mozilla-mobile/fenix/pull/5090), [mozilla-mobile/fenix#13958](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877), [mozilla-mobile/fenix#18143](https://github.com/mozilla-mobile/fenix/pull/18143)||2021-07-01 |2 |
+| experiments_default_browser.toolbar_menu_clicked |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |Set default browser was clicked from toolbar menu  |[mozilla-mobile/fenix#18895](https://github.com/mozilla-mobile/fenix/pull/18895)||2021-10-01 |2 |
 | find_in_page.closed |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user closed the find in page UI  |[mozilla-mobile/fenix#1344](https://github.com/mozilla-mobile/fenix/pull/1344#issuecomment-479285010), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
 | find_in_page.opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the find in page UI  |[mozilla-mobile/fenix#1344](https://github.com/mozilla-mobile/fenix/pull/1344#issuecomment-479285010), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
 | find_in_page.searched_page |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user searched the page  |[mozilla-mobile/fenix#1344](https://github.com/mozilla-mobile/fenix/pull/1344#issuecomment-479285010), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |