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Firefox crashes as soon as I start it, even in safe mode

  • 8 replies
  • 2 have this problem
  • Last reply by rufatagayev

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I cannot update Firefox above version 54. Any update to version above this causes an immediate (or within 5-10 seconds) crash when I start Firefox. I have tried a completely fresh install of Firefox, without any extensions, even removing any leftover folders from previous installations. It still crashes when I start, even in safe mode.

I have submitted many crash reports already. Below are the id's of the submitted crash repors:

Crash ID: bp-d38d995e-a75e-4c30-b40a-16e6c1171017 Crash ID: bp-324d62ef-4c15-4410-bbfd-e62801171017 Crash ID: bp-435205af-3b35-4db3-9304-d759e1171017 Crash ID: bp-45e31c91-4aa6-47ce-9146-0dad41171017

Crash ID: bp-96df545a-37b0-453e-91f1-567031171012 Crash ID: bp-80cdc730-d5eb-458e-9b72-2f24a1171012 Crash ID: bp-a3acb559-ee45-4d17-8852-456711171012 Crash ID: bp-68777b59-4010-499d-b2eb-7d9ea1171012

All Replies (8)

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hi rufatagayev, does it make any difference if you press windows-key+R, open %localappdata% and then delete the folder labelled "Mozilla" in the folder that opens up then?

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Hi philipp. No difference at all. Still crashing.

One observation - seems like the crash happens whenever there is an outgoing connection, i.e. I can access the options, addons pages, etc. But if I try to open a website (any website), it crashes.

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would you happen to use quickheal as your antivirus software or any other uncommon software that could impact your network traffic?

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No antivirus except Windows Defender (which is also disabled mostly). I even scanned for malware with MalwareBytes and RKill.

Another info if it helps - I even tried FF 57 beta and it still crashes. Anything later than 54 crashes.

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You can create a new profile to test if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

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Done that many times. Even installed Firefox fresh from zero, didn't help.

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Hello rufatagayev, If you can navigate "about:networking", it's helpful to have a HTTP cache logging on your side. That is, follow [1] and replace MOZ_LOG with HTTP cache [2].

Could you please provide the log if possible? Either attach to [3] or directly send to me. Great thanks to your help.

[1] [2] [3]

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Hi junior, thank you for following up. I sent you the two log files that I was able to create following the instructions (send them to the email in your profile). Hope those help. Please do let me know if I can provide any other info.