Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was closed and archived. Please ask a new question if you need help.
Locked Archived

Firefox isn’t working properly for about 3 weeks..

Firefox Site breakages
FredMcD replied 5 years ago
SuMo Bot
SuMo Bot

Hello,

I’m having trouble accessing sites like outlook mail box. I get error 500 something has gone wrong. I can login fine if I’m using edge or chrome. I noticed other sites I’m not able to login without getting some errors.

I uninstalled Firefox, deleted its files in appdata and in registry. Is there another fix to this? Or is the only solution to move to another browser?

Hello, I’m having trouble accessing sites like outlook mail box. I get error 500 something has gone wrong. I can login fine if I’m using edge or chrome. I noticed other sites I’m not able to login without getting some errors. I uninstalled Firefox, deleted its files in appdata and in registry. Is there another fix to this? Or is the only solution to move to another browser?

All Replies (1)

FredMcD
FredMcD

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

SuMo Bot
SuMo Bot Question owner

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.