dewittj@chromium.org newcomer@chromium.org cros-status-area-eng@google.com The actions taken on notifications, recorded every time they happen. This histogram will record every single event that happens separately. peter@chromium.org knollr@chromium.org Records whether we could successfully build a notification using Android's Notification Builder. If unsuccessful, we will silently drop the notification display request. This histogram was previously unused from 2024-01-14 to 2026-02-13, so data might be missing. qinmin@chromium.org peter@chromium.org Recorded when the first GetRuleIterator() is called to retrieve notification channel content settings, whether cached channels are initialized. This is only recorded on non-incognito profile and is only recorded once per browser session. This histogram was previously unused from 2024-12-31 to 2026-02-13, so data might be missing. peilinwang@google.com clank-performance-team@google.com Record the memory size in KB of notification images. Recorded when setting BigPictureStyle in ChromeNotificationWrapperBuilder on Android. peter@chromium.org qinmin@chromium.org Records the number of notification that are processed in parallel. A sample is recorded when a new intent is received by TrampolineActivity and forwarded to Chrome. Measured on Android. This histogram was previously unused from 2025-04-13 to 2026-02-13, so data might be missing. peter@chromium.org qinmin@chromium.org Records how long it takes from receiving a notification in the TrampolineActivity to finish processing the notification. A sample is recorded when a qualified notification is processed. Measured on Android. This histogram was previously unused from 2025-04-13 to 2026-02-13, so data might be missing. peter@chromium.org qinmin@chromium.org Records how long it takes from receiving a notification in the TrampolineActivity to finish initializing the native library. A sample is recorded the first time native library is initialized upon receiving a notification intent. Measured on Android. peter@chromium.org engedy@chromium.org Recorded before a call to JobScheduler.schedule() in response to a notification intent, and indicates whether there was a job already pending with the same ID. This histogram was previously unused from 2025-06-22 to 2026-02-13, so data might be missing. peter@chromium.org engedy@chromium.org Records how long native start-up took before dispatching a notification event to the NotificationPlatformBridge. For completeness, a sample is recorded also when native start-up was already partially or fully complete, in which cases significantly shorter durations are expected. Only measured on Android N and above. peter@chromium.org engedy@chromium.org After a call to JobScheduler.schedule() to handle a notification click, records whether the job ends up pending, and if so, the reason why. Recorded only in Android U and later. This histogram was previously unused from 2025-04-13 to 2026-02-13, so data might be missing. peter@chromium.org engedy@chromium.org Records wheher JobScheduler.schedule() succeeds when it is called to schedule a job with the JobScheduler to handle a notification click. This histogram was previously unused from 2025-04-13 to 2026-02-13, so data might be missing. peter@chromium.org engedy@chromium.org After a call to JobScheduler.schedule() to handle a notification click, records a sample into a specific bucket whenever the job reaches a specific stage. peter@chromium.org engedy@chromium.org Records the delay between scheduling a job with the JobScheduler (with a desired latency of 0ms, in response to a notification click) and receiving the onStartJob callback. Only measured on Android N and above. This histogram was previously unused from 2025-06-22 to 2026-02-13, so data might be missing. qinmin@chromium.org Records various events on calling Android NotificationManager. One record is emitted both before and after the call. This metric captures whether a call is made, and whether it successfully returns the desired result. Only measured on Android. peter@chromium.org Recorded when the Sites channel (which we hope to deprecate) is used as a fallback, when a site-specific notification channel is expected to exist but does not. Note, we only log when the sites channel is *used*, not when it is not used. This histogram was previously unused from 2025-01-26 to 2026-02-13, so data might be missing. qinmin@chromium.org peter@chromium.org Records key lifecycle events (Creation/Launch and Destruction/Teardown) of the notification click TrampolineActivity. Measured on Android. qinmin@chromium.org peter@chromium.org Records the lifespan duration of a trampoline activity, from its creation in onCreate() to its destruction in onDestroy(). Measured on Android. peter@chromium.org Records whether notifications are enabled for Chrome, as the Android app, for each Web Notification that is being shown to the user. knollr@chromium.org peter@chromium.org The number of muted notifications that got closed programmatically (e.g. by the developer via JS) during a screen capture session before they were shown to the user. Logged once after each screen capture session ends. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-11-12 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org The number of notifications that got muted during a screen capture session instead of being shown to the user. This number might be higher than the actual number of queued notifications at the end of a session as some notifications might have been closed programmatically before that. Logged once after each screen capture session ends. This metric was expired between August 2022 and January 2023, and may be missing data until M111. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-09-10 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org The number of muted notifications that got replaced during a screen capture session. The user will only see the final state of the notification without the previous versions. Logged once after each screen capture session ends. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-09-10 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the time from the start of a screen capture session until the user decided to reveal notification content again. Only logged if and when the user takes that action. This metric was expired between June 2022 and January 2023, and may be missing data until M111. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-07-09 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the length of a screen capture session. Notifications will be muted initially but the user may reveal them during a session. This metric will be logged after the screen capture session ends. This metric was expired between December 2022 and January 2023, and may be missing data until M111. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-11-12 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org The number of snoozed notifications that got prevented from showing up on screen during a screen capture session. This means that the user clicked on the "Snooze" action of a muted notification and continued to receive notifications but we queued them without notifying the user at all. Logged once after each screen capture session ends. This metric was expired between August 2022 and January 2023, and may be missing data until M111. This metric may be logged at possibly inappropriate times, such as when system profiles are being used. We expect that the number of "0" samples is likely an overestimate because of this. This issue is tracked in crbug.com/1385455. This histogram was previously unused from 2023-07-09 to 2026-02-13, so data might be missing. dtrainor@chromium.org nyquist@chromium.org Various events when Chrome interacts with Chime notification platform. Recorded when Chrome registers to Chime service, receives notifications, and the user interacts with the notification. dtrainor@chromium.org nyquist@chromium.org Records the result of Chime notification platform registration. Each device may have multiple accounts registered. The registration happens right after opening Chrome. wylieb@google.com bjfong@google.com evanluo@google.com Records interactions with a Chrome finds notification, such as a notification body click, dismissal, or button clicks (helpful or unhelpful buttons). wylieb@google.com bjfong@google.com evanluo@google.com Records when a Chrome finds notification is shown to the user. wylieb@google.com bjfong@google.com evanluo@google.com Records the reason why the opt-in criteria was fulfilled for Chrome Finds. Recorded when the user reaches some trigger criteria. wylieb@google.com bjfong@google.com evanluo@google.com Records everything around the opt-in flow journey for Chrome Finds. Recorded when the bottom sheet is shown, accepted (first-time vs re-opt-in), declined, dismissed, or when the action in the confirmation snackbar is clicked. newcomer@chromium.org cros-status-area-eng@google.com Records the notification type when a notification interaction occurs: {NotificationAction}. ChromeOS only. newcomer@chromium.org cros-status-area-eng@google.com Records the notification catalog name when a notification interaction occurs: {NotificationAction}. ChromeOS only. Note that this histogram is expired from March 10 to mid-July 2025. knollr@chromium.org peter@chromium.org Records the result status codes of deleting all notification data for given origins. This happens when notification permissions are revoked for a site. knollr@chromium.org peter@chromium.org Records the result status codes of deleting notification data from the Web Notification database that share their tag (replacement identifier) with a notification that's about to be shown. This metric was expired between May 2022 and July 2023 and may be missing data. This histogram was previously unused from 2024-01-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the result status codes of deleting notification data from the Web Notification database. This metric was expired between May 2022 and July 2023 and may be missing data. This histogram was previously unused from 2024-01-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the result status codes of destroying the Web Notification database altogether. This metric was expired between May 2022 and July 2023 and may be missing data. This histogram was previously unused from 2024-01-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the number of expired notifications that were stored in the database and therefore got removed and closed on the system. Logged once at startup and every time we synchronize notifications after that (e.g. to schedule the next notification trigger event). This histogram was previously unused from 2023-10-22 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the age of the oldest notification for an origin. Logged after handling a push event for that origin. This histogram was previously unused from 2022-04-17 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the result status codes of opening the Web Notification database after it has been destroyed in response to data corruption. This metric was expired between May 2022 and July 2023 and may be missing data. This histogram was previously unused from 2024-01-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the result status codes of opening the Web Notification database. This metric may be logged at possibly inappropriate times, such as when system profiles are being used, for which the notification database is usually not required. This issue is tracked in crbug.com/1385455. knollr@chromium.org peter@chromium.org Records the result status codes of reading data of all notifications associated with a Service Worker from the Web Notification database. This metric was expired between May 2022 and July 2023 and may be missing data. This histogram was previously unused from 2024-01-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org Records the result status codes of reading data of a single notification from the Web Notification database. This histogram was previously unused from 2023-06-18 to 2026-02-13, so data might be missing. skrakowi@chromium.org peter@chromium.org Records the response status after trying to find the existing NotificationDatabase entry that corresponds to the one we should update with notification content detection metadata. Logged each time a notification is shown, when we request to persist the metadata. skrakowi@chromium.org peter@chromium.org Records the response status after trying to update an existing NotificationDatabase entry with notification content detection metadata. Logged each time a notification is shown and the database entry is successfully found. knollr@chromium.org peter@chromium.org Records the result status codes of writing data for a notification to the Web Notification database. This histogram was previously unused from 2023-04-16 to 2026-02-13, so data might be missing. antoniosartori@chromium.org feuunk@chromium.org Records site engagement of sites when notifications are shown or clicked. A metric is recorded for every displayed notification, clicked notification, and suspicious warning shown reporting the site engagement of the corresponding site multiplied by 2 (we multiply by 2 in order to distinguish engagement values >=0.5 from 0 - note that the smallest possible nonnull engagement value is 0.5). The average daily volume of displayed notifications for that particular site over the past week is encoded in the histogram name. knollr@chromium.org peter@chromium.org Records the result of loading the profile when forwarding a notification event. Logged on each notification action (click, close, settings, disable) on platforms that use system notifications (not on Chrome OS or when we're using Chrome's notifications). This histogram was previously unused from 2022-04-17 to 2026-02-13, so data might be missing. mek@chromium.org pwa-team@google.com The uptime of the notification service in an app shim (PWA) process. Logged when the connection to the service in an app shim process is lost, either on purpose or because the connection was lost unexpectedly. mek@chromium.org pwa-team@google.com The uptime of the notification service in an app shim (PWA) process before it got killed unexpectedly (for example crashed). Logged when the connection to the notification service in the app shim process dies, and this wasn't because the user closed the app nor because chrome initiated the disconnect. mek@chromium.org pwa-team@google.com Records the outcome of attempting to attribute a Web App notification to its App Shim on macOS. Recorded when displaying a notification that has a Web App ID. mek@chromium.org pwa-team@google.com Records the result of adding a notification request to the macOS UNUserNotificationCenter. Recorded when the macOS API completion handler is called. Logs 0 for success, or the NSError code on failure. knollr@chromium.org peter@chromium.org The uptime of the macOS notification service process to display alerts before it got killed unexpectedly. Logged when the service process dies. This histogram was expired between 2022-08-07 and 2023-09-06. Data might be missing or incomplete for this period. This histogram was previously unused from 2024-08-07 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org The uptime of the macOS notification service process to display alerts. Logged when we close the connection to the service process either on purpose or after it got killed unexpectedly. This histogram was expired between 2022-08-14 and 2023-09-06. Data might be missing or incomplete for this period. This histogram was previously unused from 2024-08-14 to 2026-02-13, so data might be missing. awillia@chromium.org peter@chromium.org Records the number of non-persistent notifications that are displayed from a third-party context. Logged from BlinkNotificationServiceImpl::DisplayNonPersistentNotification after the notification passes the permissions check. finnur@chromium.org peter@chromium.org The execute status of a ComServerModule class instance. Logged whenever a notification_helper process is launched by Windows. Note: Not logged after M87 until end of August 2022. This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org Warning: this histogram was expired from 2026-05-24 to 2026-07; data may be missing. The primary execute status of NotificationActivator::Activate. Logged whenever a notification_helper process is launched by Windows. Note: Not logged after M85 until end of August 2022, and also not at the beginning of Sept 2023. finnur@chromium.org peter@chromium.org The secondary execute status of NotificationActivator::Activate. Logged whenever a notification_helper process is launched by Windows. Note: Not logged after M85 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The runtime of the notification_helper server process. This process is created when a notification is activated from the Windows Action Center. Once created, this process does some COM class registration work, so that Windows can call certain APIs to handle the notification activation. Upon finishing the API calls, Windows signals this process to exit. Note: Not logged after M87 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. tbarzic@chromium.org tengs@chromium.org gzadina@google.com The number of times a notification was added for the various types of sources. This histogram was previously unused from 2024-01-14 to 2026-02-13, so data might be missing. knollr@chromium.org peter@chromium.org The number of notifications that got deleted from the NotificationDatabase after the notification permissions got revoked. This histogram was previously unused from 2022-08-28 to 2026-02-13, so data might be missing. mek@chromium.org peter@chromium.org The permission request result for sending out UNNotifications through the MacNotificationServiceUN. This is recorded when instantiating the service which happens at Chrome startup and each time we start the service after shutting it down when there were no more notifications on screen. mek@chromium.org peter@chromium.org The permission status for sending out UNNotifications through the MacNotificationServiceUN. This is recorded when instantiating the service which happens at Chrome startup and each time we start the service after shutting it down when there were no more notifications on screen. mek@chromium.org peter@chromium.org The style of notifications being used for sending out UNNotifications through the MacNotificationServiceUN. This is recorded when instantiating the service which happens at Chrome startup and each time we start the service after shutting it down when there were no more notifications on screen. dewittj@chromium.org newcomer@chromium.org cros-status-area-eng@google.com Warning: this histogram was expired from 2026-03-15 to 2026-07; data may be missing. The actions taken on notifications, recorded once per notification, when it is closed. This differs from the Notifications.Actions histogram in that multiple events of the same type on a single notification will only record a single UMA event. peter@chromium.org Warning: this histogram was expired from 2026-03-22 to 2026-07; data may be missing. The number of action buttons the developer provided for a persistent Web Notification. Logged whenever showNotification is called. knollr@chromium.org peter@chromium.org The result of the promise returned by showNotification, indicating whether the notification could be shown successfully. Logged whenever showNotification is called. This metric was expired between April 2023 and December 2024, so data in this period will be missing. awillia@chromium.org peter@chromium.org Records the number of persistent notifications that are displayed from a third-party context. Logged from BlinkNotificationServiceImpl::DisplayPersistentNotification after the notification passes the permissions check. peter@chromium.org deepak.m1@samsung.com Recorded delivery status for persistent notification clicks to a Service Worker when handling a click on a persistent WebNotification has finished. This histogram was previously unused from 2023-04-23 to 2026-02-13, so data might be missing. peter@chromium.org knollr@chromium.org Records delivery status for persistent notification close events sent to a Service Worker when the event has been handled. This histogram was previously unused from 2022-09-11 to 2026-02-13, so data might be missing. shaktisahu@chromium.org nyquist@chromium.org Records the number of notifications shown in each background task run. This histogram was previously unused from 2023-06-04 to 2026-02-13, so data might be missing. shaktisahu@chromium.org nyquist@chromium.org Records life cycle events for a scheduled notification, when notification is scheduled, shown or encountering any error. {NotificationSchedulerClientType} This metric was expired between March 2023 and November 2025, so data may be missing. wylieb@google.com bjfong@google.com Records user actions for a shown tips notification, when the notification is clicked through the body or button, or dismissed. This is for Android only. {NotificationTipsFeatureType} wylieb@google.com bjfong@google.com Records the number of shown tips notifications broken down by feature type, recorded just before the notification is expected to be shown. This is for Android only. wylieb@google.com bjfong@google.com Records user actions for a shown feature tip promo, when the promo is shown, interacted with through dismissal, accepted on both the main and detail pages, and backpressed on the detail page. This is for Android only. {NotificationTipsFeatureType} wylieb@google.com bjfong@google.com Records the event type for user actions on the Tips Opt In Promo. This is recorded on show, on promo acceptance, on promo decline, and on promo ignore. Declining the promo includes clicking the negative button. Ignoring the promo includes dismissal by scrim touch, backpress, and swipe away. This is for Android only. peter@chromium.org knollr@chromium.org thomasanderson@chromium.org Indicates if Chrome is using system notifications or the Chrome notification center. Logged on each start up. peconn@chromium.org peter@chromium.org Records the delay between the user clicking on the {Action} of a web platform notification, and an Activity being launched. Only records if the duration is less than 10 seconds. peconn@chromium.org peter@chromium.org Records the delay between the user clicking on the {Action} of a web platform notification, and the notification being closed. Only records if the duration is less than 10 seconds. finnur@chromium.org peter@chromium.org Warning: this histogram was expired from 2026-06-07 to 2026-07; data may be missing. The status of Activation requests in NotificationPlatformBridgeWin (Windows only). Logged whenever an activation from a notification occurs. Note: Not logged from January 2021 to end of August 2022. finnur@chromium.org peter@chromium.org The status of Close requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a notification is closed. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023 and Sept 2024. This histogram was previously unused from 2025-03-09 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The HRESULT returned by the Windows Action Center, when trying to create a toast manager fails. This provides a more detailed error in the cases the histogram Notifications.Windows.DisplayStatus reported CREATE_TOAST_NOTIFIER_WITH_ID_FAILED. Note: Not logged after M89 until end of August 2022, and also not at the beginning of Sept 2023 and Sept 2024. This histogram was previously unused from 2025-03-09 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The HRESULT returned by the Windows Action Center, when showing a notification fails. Note: Not logged at the beginning of Sept 2023 This histogram was previously unused from 2025-05-11 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of Display requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a notification is displayed. For a more detailed error about CREATE_TOAST_NOTIFIER_WITH_ID_FAILED and SHOWING_TOAST_FAILED, see Notification.Windows histograms CreateToastManagerErrorCode and ShowFailedErrorCode (respectively). Note: Not logged between January 2022 until end of August 2022. This histogram was previously unused from 2025-03-09 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of decoding launch ids while processing a GetDisplayed requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a request to retrieve all displayed notifications comes in. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2025-05-11 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of GetDisplayedStatus requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a request to retrieve all displayed notifications comes in. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of GetNotificationLaunchId requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a request to decode the GetNotificationLaunchId comes in. Note: Not logged between January 2022 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The policy value provided by get_Setting in NotificationPlatformBridgeWin (Windows only). Logged whenever a request to show a notification comes in. Note: Not logged after M98 until end of August 2022, and not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The policy value provided by get_Setting in NotificationPlatformBridgeWin (Windows only). Logged only once at startup on a task runner. Note: Not logged at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The return value of get_Setting calls in NotificationPlatformBridgeWin (Windows only). Logged whenever a request to show a notification comes in. Note: Not logged at the beginning of Sept 2023 This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The return value of get_Setting calls in NotificationPlatformBridgeWin (Windows only). Logged only once at startup on a task runner. Note: Not logged at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of HandleEvent requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a notification event is being handled. Note: Not logged between January 2022 and end of August 2022, and not at the beginning of Sept 2023. This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of History requests in NotificationPlatformBridgeWin (Windows only). Logged whenever history is requested for notifications. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org Used to indicate the status of decoding an input launch id string (Windows only). Logged whenever a notification event is being handled. Note: Not logged after M87 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. chengx@chromium.org peter@chromium.org The status of OnFailed requests in NotificationPlatformBridgeWin (Windows only). Logged whenever a failed event is handled. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The status of SetReadyCallback requests in NotificationPlatformBridgeWin (Windows only). Logged once at startup. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org The HRESULT returned by the Windows Action Center, when trying to create a toast manager fails. This provides a more detailed error in the cases the histogram Notifications.Windows.DisplayStatus reported SHOWING_TOAST_FAILED. Note: Not logged after M98 until end of August 2022, and not at the beginning of Sept 2023. This histogram was previously unused from 2025-01-05 to 2026-02-13, so data might be missing. finnur@chromium.org peter@chromium.org Used to indicate the status of start menu shortcut (Windows only). Logged whenever a notification display attempt is made. Note: Not logged after M98 until end of August 2022, and also not at the beginning of Sept 2023. This histogram was previously unused from 2024-09-01 to 2026-02-13, so data might be missing.