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Firefox doesn't load websites, reinstallation and %APPDATA% deletion didn't help

  • 3 svar
  • 1 har dette problem
  • 5 visninger
  • Seneste svar af FredMcD

smary1
smary1
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Hi,

I'm Windows user and Firefox stopped loading web pages one day. I tried to reinstall including %APPDATA% deletion but nothing helped. I also deleted the Mozilla directory in Program Files. No matter if I use default or no proxy.

I also tried to delete some Firefox items in Register with no success. I cannot disable the Windows Antivirus since it's a company laptop. Chrome and Edge work just fine.

Can you pls advise what could cause the issue?

Thank you.

Hi, I'm Windows user and Firefox stopped loading web pages one day. I tried to reinstall including %APPDATA% deletion but nothing helped. I also deleted the Mozilla directory in Program Files. No matter if I use default or no proxy. I also tried to delete some Firefox items in Register with no success. I cannot disable the Windows Antivirus since it's a company laptop. Chrome and Edge work just fine. Can you pls advise what could cause the issue? Thank you.

Alle svar (3)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
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Does Firefox display an error message like server not found? If so, what does it display? Is anything in this article helpful: Firefox can't load websites but other browsers can.

If Firefox seems to be pretty much dead:

Have you see any messages related to missing VC Runtime files? That can cause Firefox to be mostly inoperable (tabs empty, address bar not functional). There's a dedicated page to get the latest installer for the shared VC Runtime files:

https://support.microsoft.com/en-us/topic/the-latest-supported-visual-c-downloads-2647da03-1eea-4433-9aff-95f26a218cc0

When I encountered a very similar problem, I downloaded and ran both the 32-bit and 64-bit installers in the first section of that article ("Visual Studio 2015, 2017 and 2019"). Then I restarted Windows and all was normal again.

I don't know whether 64-bit users need the 32-bit install, but Windows didn't object when I ran it (I ran it first, then 64-bit second).

Not sure whether that will help you.

smary1
smary1 Spørgsmålsstiller
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The error message is: Unable to connect. I read the threat Firefox can't load .... but didn't help.

FredMcD
FredMcD
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Is that the whole message?


There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

What do the security warning codes mean