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# 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!
---
$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
$tags:
- 'Firefox :: Tabbed Browser'
browser.engagement:
tab_unload_count:
type: counter
description: >
The count of tab unload events by TabUnloader due to a low-memory
situation.
This metric was generated to correspond to the Legacy Telemetry
scalar browser.engagement.tab_unload_count.
bugs:
- https://bugzil.la/1715858
data_reviews:
- https://bugzil.la/1715858
notification_emails:
- dao@mozilla.com
- rtestard@mozilla.com
expires: never
telemetry_mirror: BROWSER_ENGAGEMENT_TAB_UNLOAD_COUNT
no_lint:
- COMMON_PREFIX
tab_reload_count:
type: counter
description: >
The count of tab reload events by the user after unloaded.
This metric was generated to correspond to the Legacy Telemetry
scalar browser.engagement.tab_reload_count.
bugs:
- https://bugzil.la/1715858
data_reviews:
- https://bugzil.la/1715858
notification_emails:
- dao@mozilla.com
- rtestard@mozilla.com
expires: never
telemetry_mirror: BROWSER_ENGAGEMENT_TAB_RELOAD_COUNT
no_lint:
- COMMON_PREFIX
tab_explicit_unload:
type: event
description: >
Recorded when the user explicitly unloads tab(s) from memory via
the tab context menu.
notification_emails:
- gstoll@mozilla.com
- haftandilian@mozilla.com
bugs:
- https://bugzil.la/1926390
data_reviews:
- https://bugzil.la/1926390
data_sensitivity:
- interaction
extra_keys:
unload_selected_tab:
description: whether the currently-selected tab is unloaded
type: boolean
all_tabs_unloaded:
description: whether all tabs in the window were unloaded
type: boolean
tabs_unloaded:
description: The number of tabs unloaded in this operation
type: quantity
memory_before:
description: Memory usage before unloading tabs (in bytes)
type: quantity
memory_after:
description: Memory usage after unloading tabs (in bytes)
type: quantity
time_to_unload_in_ms:
description: Time to unload tabs (in ms)
type: quantity
expires: never
no_lint:
- COMMON_PREFIX
tab_unload_to_reload:
type: timing_distribution
description: >
How long (sec) a tab had been unloaded until it was reloaded.
This metric was generated to correspond to the Legacy Telemetry
exponential histogram TAB_UNLOAD_TO_RELOAD.
time_unit: second
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1715858
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1715858
notification_emails:
- tkikuchi@mozilla.com
expires: never
telemetry_mirror: TAB_UNLOAD_TO_RELOAD
no_lint:
- COMMON_PREFIX
browser.ui.interaction:
all_tabs_panel_dragstart_tab_event_count:
type: counter
description: >
Records a count of how many times a drag event started for a tab
within the All Tabs panel.
This metric was generated to correspond to the Legacy Telemetry
scalar
browser.ui.interaction.all_tabs_panel_dragstart_tab_event_count.
bugs:
- https://bugzil.la/1804722
data_reviews:
- https://bugzil.la/1804722
notification_emails:
- shong@mozilla.com
- mconley@mozilla.com
expires: never
telemetry_mirror: BROWSER_UI_INTERACTION_ALL_TABS_PANEL_DRAGSTART_TAB_EVENT_COUNT
all_tabs_panel_entrypoint:
type: labeled_counter
description: >
Records a count of how many times the All Tabs Panel was opened,
keyed on a string describing the entrypoint.
This metric was generated to correspond to the Legacy Telemetry
scalar browser.ui.interaction.all_tabs_panel_entrypoint.
bugs:
- https://bugzil.la/1804722
data_reviews:
- https://bugzil.la/1804722
notification_emails:
- shong@mozilla.com
- mconley@mozilla.com
expires: never
telemetry_mirror: BROWSER_UI_INTERACTION_ALL_TABS_PANEL_ENTRYPOINT
list_all_tabs_action:
type: labeled_counter
description: >
Records how often users interact with any top-level menu option in the
"List All Tabs" menu.
bugs:
- https://bugzil.la/2001752
data_reviews:
- https://bugzil.la/2001752
data_sensitivity:
- interaction
notification_emails:
- sthompson@mozilla.com
expires: never
labels:
- close_all_duplicates # "Close all duplicate tabs" menu item
- tabs_from_devices # "Tabs from other devices" menu item
- search_tabs # "Search tabs" menu item
tab_movement:
type: labeled_counter
description: >
Records information about user tab movements within the tab strip.
bugs:
- https://bugzil.la/1988855
data_reviews:
- https://bugzil.la/1988855
data_sensitivity:
- interaction
notification_emails:
- sthompson@mozilla.com
expires: never
labels:
- not_from_external_app
- from_external_app_next_to_active_tab
- from_external_app_tab_strip_end
tabgroup:
create_group:
type: event
description: >
Recorded when the user creates a new tab group via
the tab context menu or through drag and drop.
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
bugs:
- https://bugzil.la/1938423
- https://bugzil.la/1954500
data_reviews:
- https://bugzil.la/1938423
- https://bugzil.la/1954500
data_sensitivity:
- interaction
extra_keys:
source:
description: The means by which the tab group was created
type: string
tabs:
description: The number of tabs in the group when it was created
type: quantity
layout:
description: The layout of the tab strip when the group was created (either "horizontal" or "vertical")
type: string
id:
description: The ID of the created tab group
type: string
expires: never
reopen:
type: event
description: >
Recorded when a user reopens a saved tab group
notification_emails:
- dao@mozilla.com
- dwalker@mozilla.com
- jswinarton@mozilla.com
- dwalker@mozilla.com
bugs:
- https://bugzil.la/1938425
data_reviews:
- https://bugzil.la/1938425
extra_keys:
source:
description: The surface used to find and recall the saved group
type: string
layout:
description: The tabs layout (horizontal or vertical)
type: string
id:
description: The ID of the tab group. Tab group IDs are derived from their creation timestamps and have no other relationship to any tab group metadata.
type: string
type:
description: Whether the user reopened a saved group or a deleted group.
type: string
expires: never
add_tab:
type: event
disabled: true # To be controlled by server knobs during Firefox 138 launch due to expected high volume
description: >
Recorded when the user adds one or more ungrouped tabs to an existing tab group
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938424
data_reviews:
- https://bugzil.la/1938424
data_sensitivity:
- interaction
extra_keys:
source:
description: The system, surface, or control the user used to add the tab(s) to the tab group
type: string
tabs:
description: The number of tabs added to the tab group
type: quantity
layout:
description: The layout of the tab strip when the tabs were added (either "horizontal" or "vertical")
type: string
group_type:
description: The state of the tab group to which the tab(s) are being added ("expanded", "collapsed" or "saved")
type: string
expires: never
active_groups:
type: labeled_quantity
description: >
Records the number of groups present in the tab bar, split by expanded or collapsed.
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
bugs:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
data_reviews:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
expires: never
unit: tab groups
labels:
- expanded
- collapsed
tabs_per_active_group:
type: labeled_quantity
description: >
Records statistics about the number of tabs per active group: max, median, average and min.
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
bugs:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
data_reviews:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
expires: never
unit: tabs
labels:
- max
- median
- average
- min
saved_groups:
type: quantity
description: >
Records the number of saved tab groups present in the user's session
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938398
data_reviews:
- https://bugzil.la/1938398
expires: never
unit: tab groups
tabs_per_saved_group:
type: labeled_quantity
description: >
Records statistics about the number of tabs per saved tab group: max, median, average and min.
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938398
data_reviews:
- https://bugzil.la/1938398
expires: never
unit: tabs
labels:
- max
- median
- average
- min
tab_count_in_groups:
type: labeled_quantity
description: >
Records the latest number of tabs in the tab bar, split by being inside a group or outside.
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
bugs:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
data_reviews:
- https://bugzil.la/1938397
- https://bugzil.la/1954500
expires: never
unit: tabs
labels:
- inside
- outside
save:
type: event
description: >
Recorded when the user saves a tab group
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
bugs:
- https://bugzil.la/1938426
data_reviews:
- https://bugzil.la/1938426
expires: never
extra_keys:
user_triggered:
description: >
Whether the user explicitly chose to save the tab group, or the group
was automatically saved as a result of browser operations (e.g. the
user closed a window that has open tab groups).
type: boolean
id:
description: The ID of the saved tab group
type: string
delete:
type: event
description: >
Recorded when the user deletes a tab group
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938430
data_reviews:
- https://bugzil.la/1938430
data_sensitivity:
- interaction
extra_keys:
source:
description: The system, surface, or control the user used to delete the tab group
type: string
id:
description: Tab group ID of the tab group being deleted. Tab group IDs are derived from their creation timestamps and have no other relationship to any tab group metadata.
type: string
expires: never
ungroup:
type: event
description: >
Recorded when the user ungroups all tabs of a tab group
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1963713
data_reviews:
- https://bugzil.la/1963713
data_sensitivity:
- interaction
extra_keys:
source:
description: The system, surface, or control the user used to ungroup the tabs of the tab group
type: string
expires: never
tab_interactions:
type: labeled_counter
description: >
Records interactions with tabs related to a group: open, add tab to
group, duplicate, create a new tab, close a tab, reorder, and remove from
group
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938405
- https://bugzil.la/1960360
- https://bugzil.la/1961161
data_reviews:
- https://bugzil.la/1938405
- https://bugzil.la/1960360
- https://bugzil.la/1961161
data_sensitivity:
- interaction
labels:
- activate_expanded
- activate_collapsed
- add
- duplicate
- new
- close_tabstrip
- close_tabmenu
- close_tab_other
- reorder
- remove_same_window
- remove_other_window
- remove_new_window
expires: never
group_interactions:
type: labeled_counter
description: >
Records interactions with tab groups: expand/collapse; rename, change
color; save/reopen/delete; ungroup tabs; open from tab menu/recent/
Awesomebar; move to another window
notification_emails:
- dao@mozilla.com
- jswinarton@mozilla.com
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1938401
- https://bugzil.la/1971241
data_reviews:
- https://bugzil.la/1938401
data_sensitivity:
- interaction
labels:
- expand
- collapse
- rename
- change_color
- save
- reopen
- open_tabmenu
- open_recent
- open_suggest
- delete
- ungroup
- move_window
- hover_preview
expires: never
smart_tab_optin:
type: event
description: >
Recorded when onboards to smart tab grouping through opt-in UI
notification_emails:
- rrando@mozilla.com
- vbaungally@mozilla.com
bugs:
- https://bugzil.la/1956073
data_reviews:
- https://bugzil.la/1956073
data_sensitivity:
- interaction
extra_keys:
step:
description: step and description of opt-in screen interaction
type: string
expires: never
no_lint:
- COMMON_PREFIX
smart_tab_topic:
type: event
description: >
Recorded when the user saves a tab group label with the ml topic
model
notification_emails:
- rrando@mozilla.com
- vbaungally@mozilla.com
bugs:
- https://bugzil.la/1949010
- https://bugzil.la/1961641
data_reviews:
- https://bugzil.la/1949010
- https://bugzil.la/1961641
data_sensitivity:
- interaction
extra_keys:
action:
description: >
whether the user saved or canceled generating a label
type: string
tabs_in_group:
description: >
number of tabs in the group for which model is generating a
label
type: quantity
ml_label_length:
description: length of label suggested by model
type: quantity
user_label_length:
description: length of label saved by the user
type: quantity
levenshtein_distance:
description: >
Levenshtein distance between label suggested by model
and saved by user
type: quantity
model_revision:
description: topic model version currently running
type: string
id:
description: The ID of the created tab group
type: string
label_reason:
description: Whether the model suggested no label due to low probability or dissimilar tabs
type: string
backend:
description: The backend used for the ML Engine
type: string
expires: never
no_lint:
- COMMON_PREFIX
smart_tab_suggest:
type: event
description: >
Recorded when the user saves suggested tabs using the ml
embedding model
notification_emails:
- rrando@mozilla.com
- vbaungally@mozilla.com
bugs:
- https://bugzil.la/1949010
data_reviews:
- https://bugzil.la/1949010
data_sensitivity:
- interaction
extra_keys:
action:
description: whether the user saved or canceled
type: string
tabs_in_window:
description: number of tabs in current window
type: quantity
tabs_in_group:
description: number of tabs in the current group
type: quantity
tabs_suggested:
description: number of tabs suggested by the ml model
type: quantity
tabs_approved:
description: number of tabs the user saved from the suggestions
type: quantity
tabs_removed:
description: >
number of tabs the user removed from the
suggestions
type: quantity
model_revision:
description: embedding model version currently running
type: string
id:
description: The ID of the created tab group
type: string
backend:
description: The backend used for the ML Engine
type: string
expires: never
no_lint:
- COMMON_PREFIX
smart_tab:
type: event
description: >
Recorded when any pref cause smart tabs to be enabled / disabled
notification_emails:
- rrando@mozilla.com
- vbaungally@mozilla.com
bugs:
- https://bugzil.la/1962228
data_reviews:
- https://bugzil.la/1962228
data_sensitivity:
- interaction
extra_keys:
enabled:
description: whether the preference was enabled or disabled in any way
type: boolean
expires: never
no_lint:
- COMMON_PREFIX
smart_tab_enabled:
# metrics
type: boolean
lifetime: application
description: >
Records if the user has smart tab groups enabled
notification_emails:
- rrando@mozilla.com
- vbaungally@mozilla.com
bugs:
- https://bugzil.la/1962228
data_reviews:
- https://bugzil.la/1962228
data_sensitivity:
- interaction
expires: never
send_in_pings:
- metrics
no_lint:
- COMMON_PREFIX
browser.tabswitch:
update:
type: timing_distribution
description: >
Firefox: Time in ms spent updating UI in response to a tab switch
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_SWITCH_UPDATE_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:
- perf-telemetry-alerts@mozilla.com
- mconley@mozilla.com
expires: never
telemetry_mirror: FX_TAB_SWITCH_UPDATE_MS
total:
type: timing_distribution
description: >
Firefox: Time in ms between tab selection and tab content paint in e10s
windows
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_SWITCH_TOTAL_E10S_MS.
time_unit: millisecond
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1156592
- https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1156592
- https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
notification_emails:
- mconley@mozilla.com
expires: never
telemetry_mirror: FX_TAB_SWITCH_TOTAL_E10S_MS
spinner_visible:
type: timing_distribution
description: >
Firefox: If the spinner interstitial displays during tab switching,
records the time in ms the graphic is visible
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_SWITCH_SPINNER_VISIBLE_MS.
time_unit: millisecond
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1156592
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1156592
notification_emails:
- mconley@mozilla.com
- dothayer@mozilla.com
expires: never
telemetry_mirror: FX_TAB_SWITCH_SPINNER_VISIBLE_MS
spinner_visible_trigger:
type: labeled_counter
description: >
Diagnostic probe to aid in categorizing tab switch spinners. Records what
most recently set the loadTimer to null if a spinner was displayed.
This metric was generated to correspond to the Legacy Telemetry
categorical histogram FX_TAB_SWITCH_SPINNER_VISIBLE_TRIGGER.
labels:
- none
- preActions
- postActions
- onLoadTimeout
- onLayersReady
- onSizeModeOrOcc
- onEndSwapDocShells
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1442068
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1442068
notification_emails:
- dothayer@mozilla.com
expires: never
telemetry_mirror: h#FX_TAB_SWITCH_SPINNER_VISIBLE_TRIGGER
browser.tabclose:
time_anim:
type: timing_distribution
description: >
Firefox: Time taken from the point of closing a tab (with animation), to
the browser element being removed from the DOM. (ms).
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_CLOSE_TIME_ANIM_MS.
time_unit: millisecond
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1488952
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1488952
notification_emails:
- mconley@mozilla.com
expires: never
telemetry_mirror: FX_TAB_CLOSE_TIME_ANIM_MS
time_no_anim:
type: timing_distribution
description: >
Firefox: Time taken from the point of closing a tab (without animation) to
the browser element being removed from the DOM. (ms).
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_CLOSE_TIME_NO_ANIM_MS.
time_unit: millisecond
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1714255
- https://bugzilla.mozilla.org/show_bug.cgi?id=1730041
- https://bugzilla.mozilla.org/show_bug.cgi?id=1754640
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1714255
- https://bugzilla.mozilla.org/show_bug.cgi?id=1730041
- https://bugzilla.mozilla.org/show_bug.cgi?id=1754640
notification_emails:
- mconley@mozilla.com
expires: never
telemetry_mirror: FX_TAB_CLOSE_TIME_NO_ANIM_MS
permit_unload_time:
type: timing_distribution
description: >
Firefox: Time taken to run permitUnload on a browser during tab close to
see whether or not we're allowed to close the tab (ms).
This metric was generated to correspond to the Legacy Telemetry
exponential histogram FX_TAB_CLOSE_PERMIT_UNLOAD_TIME_MS.
time_unit: millisecond
bugs:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1714255
- https://bugzilla.mozilla.org/show_bug.cgi?id=1730041
- https://bugzilla.mozilla.org/show_bug.cgi?id=1754640
data_reviews:
- https://bugzilla.mozilla.org/show_bug.cgi?id=1340842
- https://bugzilla.mozilla.org/show_bug.cgi?id=1714255
- https://bugzilla.mozilla.org/show_bug.cgi?id=1730041
- https://bugzilla.mozilla.org/show_bug.cgi?id=1754640
notification_emails:
- mconley@mozilla.com
expires: never
telemetry_mirror: FX_TAB_CLOSE_PERMIT_UNLOAD_TIME_MS
link.handling:
open_next_to_active_tab_settings_enabled:
type: boolean
lifetime: application
description: >
Records if the user has the "Open links from apps next to your active tab"
feature enabled.
notification_emails:
- sthompson@mozilla.com
bugs:
- https://bugzil.la/1988855
data_reviews:
- https://bugzil.la/1988855
data_sensitivity:
- interaction
expires: never
no_lint:
- COMMON_PREFIX
open_next_to_active_tab_settings_change:
type: event
description: >
This is recorded when the "Open links from apps next to your active tab"
checkbox in the General > Tabs section of about:preferences is toggled.
bugs:
- https://bugzil.la/1988855
data_reviews:
- https://bugzil.la/1988855
data_sensitivity:
- interaction
notification_emails:
- sthompson@mozilla.com
expires: never
extra_keys:
checked:
description: >
Whether the checkbox was toggled on or off.
type: boolean
no_lint:
- COMMON_PREFIX
open_from_external_app:
type: event
description: >
This is recorded when a link is clicked outside of Firefox and this external
link is then opened inside of Firefox. The "Open links from apps next to
your active tab" option governs the behavior of where the link will be opened.
bugs:
- https://bugzil.la/1988855
data_reviews:
- https://bugzil.la/1988855
data_sensitivity:
- interaction
notification_emails:
- sthompson@mozilla.com
expires: never
extra_keys:
next_to_active_tab:
description: >
Whether the link was opened next to the active tab.
type: boolean
no_lint:
- COMMON_PREFIX
splitview:
uri_count:
type: labeled_counter
description: >
Records how many URIs were loaded on each side of the splitview.
bugs:
- https://bugzil.la/2013097
data_reviews:
- https://bugzil.la/2013097
data_sensitivity:
- interaction
notification_emails:
- sfoster@mozilla.com
expires: never
labels:
- "1" # left side
- "2" # right side
start:
type: event
description: >
Recorded when a user starts a split view.
bugs:
- https://bugzil.la/1992744
data_reviews:
- https://bugzil.la/1992744
data_sensitivity:
- interaction
notification_emails:
- kcochrane@mozilla.com
expires: never
extra_keys:
tab_layout:
description: The layout of the tab strip (horizontal or vertical)
type: string
trigger:
description: The method used to start the split view (menu_add for 1 tab selected, menu_open for 2 tabs selected, alt_click for Alt/Option+clicking another tab)
type: string
tabgroup:
description: The tab group state (none for neither tab in a group, main for primary tab in a group, other for secondary tab in a group, both_same for both tabs in same group, both_different for both tabs in different groups)
type: string
end:
type: event
description: >
Recorded when a user terminates a split view.
bugs:
- https://bugzil.la/1992744
data_reviews:
- https://bugzil.la/1992744
data_sensitivity:
- interaction
notification_emails:
- kcochrane@mozilla.com
expires: never
extra_keys:
tab_layout:
description: The layout of the tab strip (horizontal or vertical)
type: string
trigger:
description: The method used to end the split view (menu_separate, icon_separate, icon_close, tab_close, footer_separate, footer_close)
type: string
reverse:
type: event
description: >
Recorded when the user reverses tabs in a split view.
bugs:
- https://bugzil.la/1992744
data_reviews:
- https://bugzil.la/1992744
data_sensitivity:
- interaction
notification_emails:
- kcochrane@mozilla.com
expires: never
extra_keys:
trigger:
description: The method used to reverse tabs (icon for split view icon menu, footer for split view footer menu)
type: string
resize:
type: event
description: >
Recorded at the end of a resize action in a split view.
bugs:
- https://bugzil.la/1992744
data_reviews:
- https://bugzil.la/1992744
data_sensitivity:
- interaction
notification_emails:
- kcochrane@mozilla.com
expires: never
extra_keys:
width:
description: Rounded percentage of view area width
type: quantity