1995416 - Firefox is freezing due to website notifications (w11, all forks)

Status: UNCONFIRMED

(Firefox :: General, defect)

Description

[Eriskyn]

Attachment: IMG_4951.jpeg

User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 26_1_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/140.0.7339.232 Mobile/15E148 Safari/604.1

Steps to reproduce:

Firefox is running

Sometimes it's right away or when I leave it running for x amount of time when not in use

This happens on all forks and does not go away on new install, firefox refresh, new profile, or on troubleshoot mode.

Actual results:

Firefox freezes and forces me to restart the program. I'm usually greeted with this error message. Sometimes I get a crash report.

Expected results:

Not freeze

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox for Android::General' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Stephen Thompson [:sthompson]]

Hi Eriskyn, which platform are you using?

Do you have a link or other information for your crash reports? Check about:crashes and open any of the crashes that you submitted. If you paste those URL(s) here, it could help us understand what's happening.

Comment 3

[Negritas Sergiu, Desktop QA]

Hello! I have tried to reproduce the issue with firefox 144.0 and 146.0a1(2025-10-29) on Windows 10 and Ubuntu 22.04, unfortunately I wasn't able to reproduce the issue.
Could you please answer the following questions in order to further investigate this issue

1. Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2. Could you please provide more detailed steps on how to reproduce the issue?
3. On what OS did you encounter this issue?

Comment 4

[Eriskyn]

(In reply to Negritas Sergiu, Desktop QA from comment #3)

Hello! I have tried to reproduce the issue with firefox 144.0 and 146.0a1(2025-10-29) on Windows 10 and Ubuntu 22.04, unfortunately I wasn't able to reproduce the issue.
Could you please answer the following questions in order to further investigate this issue

1. Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2. Could you please provide more detailed steps on how to reproduce the issue?
3. On what OS did you encounter this issue?

Sorry for the late response but it took a lot of trial and error.

On w11, notifications from any website (in my case twitch and ring) will cause firefox to freeze, clicking on the firefox window will make a generic windows error sound, and force the user to kill the firefox process in task manager. Omxe firefox is restarted, the error message I linked will usually take precedent before firefox opens again.

Disabling notifications seems to have stop the issue.

This occurs on any fork of Firefox, on a brand new profile, and even did various windows repair methods.

Comment 5

[Eriskyn]

Omxe firefox is restarted,
*Once Firefox is restarted

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:emcminn, could you have a look please?

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