firefox/browser/components/sessionstore/metrics.yaml

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# Adding a new metric? We have docs for that!
# https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html

---
$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
$tags:
  - 'Firefox :: Session Restore'

session_restore:
  backup_can_be_loaded_session_file:
    type: event
    description: >
      Recorded when a file is able to be successfully read on startup
      This event was generated to correspond to the Legacy Telemetry event
      session_restore.backup_can_be_loaded#session_file.
    bugs:
      - https://bugzil.la/1874742
    data_reviews:
      - https://bugzil.la/1874742
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    extra_keys:
      can_load:
        description: >
          Whether or not the startup file can be read/loaded
        type: string
      path_key:
        description: >
          A symbolic name for the backup file, should be one of "clean", "recovery", "recoveryBackup", "cleanBackup", or "upgradeBackup"
        type: string
      loadfail_reason:
        description: >
          Reason why the file cannot be loaded, N/A if can be loaded
        type: string
    telemetry_mirror: Session_restore_BackupCanBeLoaded_SessionFile

  shutdown_success_session_startup:
    type: event
    description: >
      Report shutdown success
      This event was generated to correspond to the Legacy Telemetry event
      session_restore.shutdown_success#session_startup.
    bugs:
      - https://bugzil.la/1874742
    data_reviews:
      - https://bugzil.la/1874742
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    extra_keys:
      shutdown_ok:
        description: >
          Whether or not the shutdown happened successfully, unsuccessful if previous session crashed
        type: string
      shutdown_reason:
        description: >
          Reason why shutdown didn't happen successfully, N/A if previous session didn't crashed
        type: string
    telemetry_mirror: Session_restore_ShutdownSuccess_SessionStartup

  startup_init_session:
    type: timing_distribution
    description: >
      Session restore: Time it takes to prepare the data structures for
      restoring a session (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_STARTUP_INIT_SESSION_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_STARTUP_INIT_SESSION_MS

  startup_onload_initial_window:
    type: timing_distribution
    description: >
      Session restore: Time it takes to finish restoration once we have first
      opened a window (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_STARTUP_ONLOAD_INITIAL_WINDOW_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_STARTUP_ONLOAD_INITIAL_WINDOW_MS

  collect_all_windows_data:
    type: timing_distribution
    description: >
      Session restore: Time to collect all window data (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_COLLECT_ALL_WINDOWS_DATA_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_COLLECT_ALL_WINDOWS_DATA_MS

  collect_data:
    type: timing_distribution
    description: >
      Session restore: Time to collect all window and tab data (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_COLLECT_DATA_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_COLLECT_DATA_MS

  collect_session_history:
    type: timing_distribution
    description: >
      Session restore: Duration of session history collection in the parent
      process (ms).

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_COLLECT_SESSION_HISTORY_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1810704
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1810704
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
      - farre@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_COLLECT_SESSION_HISTORY_MS

  read_file:
    type: timing_distribution
    description: >
      Session restore: Time to read the session data from the file on disk (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_READ_FILE_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_READ_FILE_MS

  write_file:
    type: timing_distribution
    description: >
      Session restore: Time to write the session data to the file on disk (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_WRITE_FILE_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_WRITE_FILE_MS

  file_size_bytes:
    type: memory_distribution
    description: >
      Session restore: The size of file sessionstore.js (bytes)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_FILE_SIZE_BYTES.
    memory_unit: byte
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_FILE_SIZE_BYTES

  corrupt_file:
    type: labeled_counter
    description: >
      Session restore: Whether the file read on startup contained parse-able
      JSON

      This metric was generated to correspond to the Legacy Telemetry boolean
      histogram FX_SESSION_RESTORE_CORRUPT_FILE.
    labels:
      - "false"
      - "true"
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: h#FX_SESSION_RESTORE_CORRUPT_FILE

  all_files_corrupt:
    type: labeled_counter
    description: >
      Session restore: Whether none of the backup files contained parse-able
      JSON

      This metric was generated to correspond to the Legacy Telemetry boolean
      histogram FX_SESSION_RESTORE_ALL_FILES_CORRUPT.
    labels:
      - "false"
      - "true"
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: h#FX_SESSION_RESTORE_ALL_FILES_CORRUPT

  restore_window:
    type: timing_distribution
    description: >
      Session restore: Time spent blocking the main thread while restoring a
      window state (ms)

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_RESTORE_WINDOW_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_RESTORE_WINDOW_MS

  auto_restore_duration_until_eager_tabs_restored:
    type: timing_distribution
    description: >
      Session restore: If the browser is setup to auto-restore tabs, this probe
      measures the time elapsed between the instant we start Session Restore and
      the instant we have finished restoring tabs eagerly. At this stage, the
      tabs that are restored on demand are not restored yet.

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram
      FX_SESSION_RESTORE_AUTO_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_AUTO_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS

  manual_restore_duration_until_eager_tabs_restored:
    type: timing_distribution
    description: >
      Session restore: If a session is restored by the user clicking on 'Restore
      Session', this probe measures the time elapsed between the instant the
      user has clicked and the instant we have finished restoring tabs eagerly.
      At this stage, the tabs that are restored on demand are not restored yet.

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram
      FX_SESSION_RESTORE_MANUAL_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS.
    time_unit: millisecond
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_MANUAL_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS

  number_of_tabs_restored:
    type: custom_distribution
    description: >
      Session restore: Number of tabs in the session that has just been
      restored.

      This metric was generated to correspond to the Legacy Telemetry
      exponential histogram FX_SESSION_RESTORE_NUMBER_OF_TABS_RESTORED.
    range_min: 1
    range_max: 500
    bucket_count: 20
    histogram_type: exponential
    unit: tabs
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_NUMBER_OF_TABS_RESTORED

  number_of_windows_restored:
    type: custom_distribution
    description: >
      Session restore: Number of windows in the session that has just been
      restored.

      This metric was generated to correspond to the Legacy Telemetry enumerated
      histogram FX_SESSION_RESTORE_NUMBER_OF_WINDOWS_RESTORED.
    range_min: 0
    range_max: 50
    bucket_count: 51
    histogram_type: linear
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_NUMBER_OF_WINDOWS_RESTORED

  number_of_eager_tabs_restored:
    type: custom_distribution
    description: >
      Session restore: Number of tabs restored eagerly in the session that has
      just been restored.

      This metric was generated to correspond to the Legacy Telemetry enumerated
      histogram FX_SESSION_RESTORE_NUMBER_OF_EAGER_TABS_RESTORED.
    range_min: 0
    range_max: 50
    bucket_count: 51
    histogram_type: linear
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1944631
    notification_emails:
      - session-restore-telemetry-alerts@mozilla.com
    expires: never
    telemetry_mirror: FX_SESSION_RESTORE_NUMBER_OF_EAGER_TABS_RESTORED

  shutdown_ok:
    type: labeled_counter
    description: >
      Did the browser start after a successful shutdown

      This metric was generated to correspond to the Legacy Telemetry boolean
      histogram SHUTDOWN_OK.
    labels:
      - "false"
      - "true"
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1421688
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1421688
    notification_emails:
      - chutten@mozilla.com
    expires: never
    telemetry_mirror: h#SHUTDOWN_OK

browser.engagement:
  sessionrestore_interstitial:
    type: labeled_counter
    description: >
      Whether we show about:sessionrestore or not. Split by key, which
      indicates why we showed the item or not. Specifically,
      'deferred_restore' means we didn't autorestore and thus didn't show
      the interstitial; 'autorestore' indicates we autorestored without
      showing the interstitial. 'shown_old_session',
      'shown_only_about_welcomeback', 'shown_many_crashes',
      'shown_many_crashes_old_session' all indicate we did show the
      interstitial because of a crash, and the text after 'shown'
      indicates what secondary reason there was to show this page (as we
      don't show it for 'just' one crash).
      This metric was generated to correspond to the Legacy Telemetry
      scalar browser.engagement.sessionrestore_interstitial.
    bugs:
      - https://bugzil.la/1671271
    data_reviews:
      - https://bugzil.la/1671271
    notification_emails:
      - gijs@mozilla.com
    expires: never
    telemetry_mirror: BROWSER_ENGAGEMENT_SESSIONRESTORE_INTERSTITIAL