1770413 - [Intermittent] The number of tabs and the websites are not properly restored after forcing a crash and reopening the session from the crash prompt

Status: NEW

(Firefox :: Session Restore, defect)

Description

[Carmen Fat [:cfat] - Ecosystem QA]

[Notes]:

• After restoring the browsing session using the Mozilla Crash Report dialog, the following error is displayed in the Browser Console:
  BackgroundUpdate: maybeScheduleBackgroundUpdateTask: exiting after uncaught exception in maybeScheduleBackgroundUpdateTask! Exception { name: "NS_ERROR_FAILURE", message: "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIWinTaskSchedulerService.registerTask]", result: 2147500037, filename: "resource://gre/modules/TaskSchedulerWinImpl.jsm", lineNumber: 51, columnNumber: 0, data: null, stack: "registerTask@resource://gre/modules/TaskSchedulerWinImpl.jsm:51:16\nregisterTask@resource://gre/modules/TaskScheduler.jsm:136:18\n_registerBackgroundUpdateTask@resource://gre/modules/BackgroundUpdate.jsm:287:38\n", location: XPCWrappedNative_NoHelper }

[Affected versions]:

• Firefox RC 100.0.1, Build ID: 20220513165813
• Firefox Beta 101.0b9, Build ID: 20220519220322
• Firefox Nightly 102.0a1, Build ID: 20220520093126

[Affected platforms]:

• Windows 11 x64

[Prerequisites]:

• Have Firefox installed.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Open a new tab and click one of the top sites.
3. Repeat step 2 with other top sites.
4. Open a new tab and navigate to the "about:crashparent" page.
5. From the Mozilla Crash Report dialog, click the "Restart Firefox" option.
6. Observe what happens next.

[Expected result]:

• The number of tabs opened at steps 2 and 3 are restored and the websites correctly load.

[Actual result]:

• A smaller number of tabs are restored with the websites from steps 2 and 3 being replaced by new tabs.

[Additional notes]:

• This issue is also reproducible with the “Open previous windows and tabs” checked option on the “about:preferences” page.
• This issue wasn’t noticed on other OSes besides Windows 11.
• Here is a screen recording with the issue.

Comment 1

[Maria Heres, inactive, contact Ecosystem QA]

This issue is also reproducible on macOS 11.6.6 using Firefox 103.0.1 (Build ID: 20220729222726).