Interesting.... What happens on this site? https://webcammictest.com/ Desktop, laptop, or DIY? If not DIY, what make and model?. Graphic card and what driver version? Did you try with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search What security software besides MS Defender are you running? Windows home or pro? If you're running Windows Pro version, I would test in the Sandbox to confirm. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

The crash report is several pages of data. We need the report numbers to see the whole report.

1. Enter about:crashes in the Firefox address bar and press Enter. A list of Submitted (and Unsubmitted, if any) Crash Reports will appear, similar to the one shown below.
2. Copy the 5 most recent Submitted Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

After some digging and trial and error of my own I've discovered the cause of my problems. One of the recent updates to the Meat Quest Link app on pc causes it to crash firefox whenever prompted to allow audio or video capabilities. I have also experienced it on discord when changing video devices between my webcam and one of the virtual cameras from meta. From what I can see, it sadly seems like my only options are to wait for meta to fix this issue on their end, or remove all parts of the link app from my pc. The following link shows others on the meta forums talking about this issue. Thanks for the help offered everyone. I'll close this question now since it doesn't seem like there are currently other options for me. https://communityforums.atmeta.com/discussions/OtherTroubleshooting/meta-quest-link-app-causes-firefox-to-crash/1341972

Great. Mark it as resolved and have a nice day.

I have the exact same issue and the meta quest link app installed too, kind of sad because I don't want to get rid of it but at the same time I want to make video calls on Instagram via Firefox. I will try to contribute by reporting the issue to meta support. Thank you.

Firefox crashes whenever it would need access to my camera or microphone. So far it has only happened whn trying to access a Roll20 game with camera and microphone connectivity, and when trying to access a video appointment for Universal Credit. It never happened on Windows 10, but since updating to Windows 11 it happens every time without fail, and the crash is immediate.

Hey @pivotgage01

The comment by nexusmtz in this reddit thread helped me fix the issue.

I was able to disable the Meta Cameras in windows without having to uninstall the oculus link app and now I can also use cameras in firefox without it crashing :)

I've also made a copy of the script below, just in case the comment is deleted, or the user is deleted in reddit. Just run it in an elevated powershell (cause you need to be admin to edit the registry)

The script will also backup the deleted items into your document folder. If you need to restore it just double click the vfwccminstances.reg file that will be created there.

This is the script:

$keyname='SOFTWARE\Classes\CLSID\{860BB310-5D01-11d0-BD3B-00A0C911CE86}\Instance' reg export "HKLM\$keyname" "$([Environment]::GetFolderPath("MyDocuments"))\vfwccminstances.reg" Get-ChildItem "hklm:\$keyname"|Where-Object {$_.GetValue('FriendlyName') -match '^Meta'}|Remove-Item

Hi everyone,

For reference, see bug 1986922. It is currently fixed in Firefox 145, which is in Nightly. This version's release is scheduled for November 11, but I'll let you know in case the fix is deployed in one of the earlier versions.

As said in the bug, you can directly block magicdsfilterQuest3.dll to prevent crashes until the fix lands. See Identify problems caused by third-party modules in Firefox for Windows.