User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Steps to reproduce:

Run Firefox and open about 20 sites in different tabs
Close Firefox and try to run it again

Actual results:

Firefox already running dialog appears, see attached screenshot.
Crash report dialog appears with attached details:
https://docs.google.com/document/d/108Crfq2o-ZYMR1t5lDxfL7zNFiNEfqWBDG7s97uuj44/edit?usp=sharing

Expected results:

Firefox should start normally

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Win32' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Judging from the MozCrashReason: [Parent 12444, Main Thread] ###!!! ABORT: file resource://gre/modules/JSONFile.sys.mjs:126, this probably isn't 'Core::Widget: Win32', although it's difficult to tell what it should be. Moving to 'Toolkit::Application Update', on the weak basis that AsyncShutdownTimeout contains BackgroundUpdate.sys.mjs in the stack.

Jury.Lysenko: did you submit the crash report? (The full crash report contains structured information about the application state not present in the attached summary.) If so, can you go to about:crashes and let us know what the corresponding report ID is?

(In reply to Ray Kraesig [:rkraesig] from comment #3)

Judging from the MozCrashReason: [Parent 12444, Main Thread] ###!!! ABORT: file resource://gre/modules/JSONFile.sys.mjs:126, this probably isn't 'Core::Widget: Win32', although it's difficult to tell what it should be. Moving to 'Toolkit::Application Update', on the weak basis that AsyncShutdownTimeout contains BackgroundUpdate.sys.mjs in the stack.

Jury.Lysenko: did you submit the crash report? (The full crash report contains structured information about the application state not present in the attached summary.) If so, can you go to about:crashes and let us know what the corresponding report ID is?

ID звіту Дата надсилання
bp-001a6afa-ad36-405a-b599-fc4a90240102 02.01.2024, 19:03

Just reproduced again, see crash report bp-dcdef866-798d-4b53-a61d-c84430240106 06.01.2024, 20:00

many Firefox processes remains in Task manager after close Firefox window

one more crash bp-d311cdd0-8278-40f6-aaae-cb3920240107 07.01.2024, 6:12

Thanks for the report! I was able to replicate this pretty consistently on Nightly 123 and on ESR 115.

bp-978cfaeb-e309-4b32-83b5-616a10240114 14.01.2024, 5:53

bp-e38af591-6ab0-4b83-9615-3944d0240206 06.02.2024, 7:03

see new crash bp-1b459015-c8d0-4f4a-962b-2c3660240216 16.02.2024, 11:35

see one more bp-19000fc3-5257-4e92-854f-02f7e0240216 16.02.2024, 20:21

:nalexander, I believe you mentioned investigating this, assigning for now.