diff --git a/app/metrics.yaml b/app/metrics.yaml
index 1ed7fcc93..3373a28a7 100644
--- a/app/metrics.yaml
+++ b/app/metrics.yaml
@@ -331,7 +331,20 @@ events:
     notification_emails:
       - fenix-core@mozilla.com
     expires: "2021-04-01"
-
+  recently_closed_tabs_opened:
+    type: event
+    description: |
+      An event that indicates that the user
+      has accessed recently closed tabs list.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/15366
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/pull/16739
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - fenix-core@mozilla.com
+    expires: "2021-05-10"
 onboarding:
   fxa_auto_signin:
     type: event
diff --git a/docs/metrics.md b/docs/metrics.md
index 3d6dab3f2..5ada54486 100644
--- a/docs/metrics.md
+++ b/docs/metrics.md
@@ -106,6 +106,7 @@ The following metrics are added to the ping:
 | events.opened_link |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened a link with Fenix  |[1](https://github.com/mozilla-mobile/fenix/pull/5975), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<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>|2021-04-01 |2 |
 | events.performed_search |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user performed a search  |[1](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673), [2](https://github.com/mozilla-mobile/fenix/pull/1677), [3](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<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>|2021-04-01 |2 |
 | events.preference_toggled |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user toggled a boolean preference in settings  |[1](https://github.com/mozilla-mobile/fenix/pull/1896), [2](https://github.com/mozilla-mobile/fenix/pull/5704), [3](https://github.com/mozilla-mobile/fenix/pull/5886), [4](https://github.com/mozilla-mobile/fenix/pull/5975), [5](https://github.com/mozilla-mobile/fenix/pull/6352), [6](https://github.com/mozilla-mobile/fenix/pull/6601), [7](https://github.com/mozilla-mobile/fenix/pull/6746), [8](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>enabled: Whether or not the preference is *now* enabled</li><li>preference_key: The preference key for the boolean (true/false) preference the user toggled.  We currently track: show_search_suggestions, remote_debugging, telemetry, tracking_protection, search_bookmarks, search_browsing_history, show_clipboard_suggestions, show_search_shortcuts, open_links_in_a_private_tab (bug in implementation https://github.com/mozilla-mobile/fenix/issues/7384), pref_key_sync_logins, pref_key_sync_bookmarks, pref_key_sync_history, pref_key_show_voice_search, and pref_key_show_search_suggestions_in_private. </li></ul>|2021-06-01 |1, 2 |
+| events.recently_closed_tabs_opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |An event that indicates that the user has accessed recently closed tabs list.  |[1](https://github.com/mozilla-mobile/fenix/pull/16739)||2021-05-10 |2 |
 | events.search_bar_tapped |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user tapped the search bar  |[1](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<ul><li>source: The view the user was on when they initiated the search (For example: `Home` or `Browser`) </li></ul>|2021-04-01 |2 |
 | events.tab_counter_menu_action |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A tab counter menu item was tapped |[1](https://github.com/mozilla-mobile/fenix/pull/11533), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)|<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>|2021-04-01 |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  |[1](https://github.com/mozilla-mobile/fenix/pull/5090), [2](https://github.com/mozilla-mobile/fenix/pull/13958#issuecomment-676857877)||2021-04-01 |2 |