Closes #10616 - Update docs for app_opened to reflect cold-start

app/metrics.yaml

@@ -11,7 +11,7 @@ events:
   app_opened:
     type: event
     description: |
-      A user opened the app
+      A user opened the app (from cold start, to the homescreen or browser)
     extra_keys:
       source:
         description: |
@@ -19,6 +19,7 @@ events:
           `custom_tab` or `link`
     bugs:
       - https://github.com/mozilla-mobile/fenix/issues/968
+      - https://github.com/mozilla-mobile/fenix/issues/10616
     data_reviews:
       - https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673
     notification_emails:

docs/metrics.md

@@ -95,7 +95,7 @@ The following metrics are added to the ping:
 | download_notification.resume |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user resumed a download in the download notification  |[1](https://github.com/mozilla-mobile/fenix/pull/6554)||2020-09-01 |
 | download_notification.try_again |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user tapped on try again when a download fails in the download notification  |[1](https://github.com/mozilla-mobile/fenix/pull/6554)||2020-09-01 |
 | error_page.visited_error |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user encountered an error page  |[1](https://github.com/mozilla-mobile/fenix/pull/2491#issuecomment-492414486)|<ul><li>error_type: The error type of the error page encountered</li></ul>|2020-09-01 |
-| events.app_opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the app  |[1](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673)|<ul><li>source: The method used to open Fenix. Possible values are: `app_icon`, `custom_tab` or `link` </li></ul>|2020-09-01 |
+| events.app_opened |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user opened the app (from cold start, to the homescreen or browser)  |[1](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673)|<ul><li>source: The method used to open Fenix. Possible values are: `app_icon`, `custom_tab` or `link` </li></ul>|2020-09-01 |
 | events.browser_menu_action |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A browser menu item was tapped  |[1](https://github.com/mozilla-mobile/fenix/pull/1214#issue-264756708), [2](https://github.com/mozilla-mobile/fenix/pull/5098#issuecomment-529658996), [3](https://github.com/mozilla-mobile/fenix/pull/6310)|<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>|2020-09-01 |
 | events.entered_url |[event](https://mozilla.github.io/glean/book/user/metrics/event.html) |A user entered a url  |[1](https://github.com/mozilla-mobile/fenix/pull/1067#issuecomment-474598673)|<ul><li>autocomplete: A boolean that tells us whether the URL was autofilled by an Autocomplete suggestion </li></ul>|2020-09-01 |
 | 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)|<ul><li>mode: The mode the link was opened in. Either 'PRIVATE' or 'NORMAL'. </li></ul>|2020-09-01 |