Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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 archived. Please ask a new question if you need help.

problem following upgrade to big sur

  • 1 reply
  • 1 has this problem
  • 17 views
  • Last reply by FredMcD

gcscales
gcscales
more options

I recently upgraded my iMac operating system from Mohave to Big Sur and now find I am unable to login to Facebook using FireFox. I can access it via Safari but FireFox is my preferred browser.

I recently upgraded my iMac operating system from Mohave to Big Sur and now find I am unable to login to Facebook using FireFox. I can access it via Safari but FireFox is my preferred browser.

All Replies (1)

FredMcD
FredMcD
more options

Please explain the problem in detail. What happens? What is/are the exact error message(s) ?


Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection

Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?


Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.