diff --git a/app/metrics.yaml b/app/metrics.yaml
index b1e66b457..4c2546e04 100644
--- a/app/metrics.yaml
+++ b/app/metrics.yaml
@@ -5207,3 +5207,31 @@ android_keystore_experiment:
     notification_emails:
       - fenix-core@mozilla.com
     expires: "2021-09-01"
+
+set_default_newtab_experiment:
+  set_default_browser_clicked:
+    type: event
+    description: |
+      Set default browser was clicked from new tab screen.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/18853
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/18895
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-10-01"
+  close_experiment_card_clicked:
+    type: event
+    description: |
+      Close experiment card was clicked from new tab screen.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/18853
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/18895
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-10-01"
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 01f2c1427..472747f52 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
@@ -224,6 +224,10 @@ sealed class Event {
     object SearchSuggestionClicked : Event()
     object OpenedTabSuggestionClicked : Event()
 
+    // Set default browser experiment metrics
+    object SetDefaultBrowserClicked : Event()
+    object CloseExperimentCardClicked : 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 2c3ee37c8..807e31dfb 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
@@ -53,6 +53,7 @@ import org.mozilla.fenix.GleanMetrics.SearchDefaultEngine
 import org.mozilla.fenix.GleanMetrics.SearchShortcuts
 import org.mozilla.fenix.GleanMetrics.SearchSuggestions
 import org.mozilla.fenix.GleanMetrics.SearchWidget
+import org.mozilla.fenix.GleanMetrics.SetDefaultNewtabExperiment
 import org.mozilla.fenix.GleanMetrics.SyncAccount
 import org.mozilla.fenix.GleanMetrics.SyncAuth
 import org.mozilla.fenix.GleanMetrics.SyncedTabs
@@ -814,6 +815,13 @@ private val Event.wrapper: EventWrapper<*>?
             { HomeMenu.settingsItemClicked.record(it) }
         )
 
+        is Event.CloseExperimentCardClicked -> EventWrapper<NoExtraKeys>(
+            { SetDefaultNewtabExperiment.closeExperimentCardClicked.record(it) }
+        )
+        is Event.SetDefaultBrowserClicked -> EventWrapper<NoExtraKeys>(
+            { SetDefaultNewtabExperiment.setDefaultBrowserClicked.record(it) }
+        )
+
         // Don't record other events in Glean:
         is Event.AddBookmark -> null
         is Event.OpenedAppFirstRun -> null
diff --git a/app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlController.kt b/app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlController.kt
index 684fca0fc..62cd02563 100644
--- a/app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlController.kt
+++ b/app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlController.kt
@@ -567,11 +567,13 @@ class DefaultSessionControlController(
 
     override fun handleSetDefaultBrowser() {
         settings.userDismissedExperimentCard = true
+        metrics.track(Event.SetDefaultBrowserClicked)
         activity.openSetDefaultBrowserOption()
     }
 
     override fun handleCloseExperimentCard() {
         settings.userDismissedExperimentCard = true
+        metrics.track(Event.CloseExperimentCardClicked)
         fragmentStore.dispatch(HomeFragmentAction.RemoveSetDefaultBrowserCard)
     }
 }
diff --git a/docs/metrics.md b/docs/metrics.md
index bb13ad5e7..5c2c48c5e 100644
--- a/docs/metrics.md
+++ b/docs/metrics.md
@@ -206,6 +206,8 @@ In addition to those built-in metrics, the following metrics are added to the pi
 | search_suggestions.enable_in_private |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user enabled receiving search suggestions in private sessions  |[mozilla-mobile/fenix#6746](https://github.com/mozilla-mobile/fenix/pull/6746), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |1, 2 |
 | search_widget.new_tab_button |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user pressed anywhere from the Firefox logo until the start of the microphone icon, opening a new tab search screen.  |[mozilla-mobile/fenix#4714](https://github.com/mozilla-mobile/fenix/pull/4714), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
 | search_widget.voice_button |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user pressed the microphone icon, opening a new voice search screen.  |[mozilla-mobile/fenix#4714](https://github.com/mozilla-mobile/fenix/pull/4714), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
+| set_default_newtab_experiment.close_experiment_card_clicked |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |Close experiment card was clicked from new tab screen.  |[mozilla-mobile/fenix#18895](https://github.com/mozilla-mobile/fenix/pull/18895)||2021-10-01 |2 |
+| set_default_newtab_experiment.set_default_browser_clicked |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |Set default browser was clicked from new tab screen.  |[mozilla-mobile/fenix#18895](https://github.com/mozilla-mobile/fenix/pull/18895)||2021-10-01 |2 |
 | sync_account.opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the sync account page  |[mozilla-mobile/fenix#2745](https://github.com/mozilla-mobile/fenix/pull/2745#issuecomment-494918532), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
 | sync_account.send_tab |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user sent the current tab to another FxA device  |[mozilla-mobile/fenix#5106](https://github.com/mozilla-mobile/fenix/pull/5106), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |
 | sync_account.sign_in_to_send_tab |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user pressed the "sign in to send tab" button inside the share tab menu  |[mozilla-mobile/fenix#5106](https://github.com/mozilla-mobile/fenix/pull/5106), [mozilla-mobile/fenix#15713](https://github.com/mozilla-mobile/fenix/pull/15713#issuecomment-703972068)||2021-08-01 |2 |