This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

Facebook and Firefox does not recognise Firefox as my browser.Unable to install any add-ons from Firefox.

  • 2 replies
  • 50 have this problem
  • 2 views
  • Last reply by reiner707

reiner707
reiner707
more options

This all happened suddenly by itself. I did not install any new programs or software of any kind. I have Norton security software, but this has been installed on my PC for 6 months without any problems. I have uninstalled Firefox3.6,10. And reinstalled it, but it does not solve the problems.

This all happened suddenly by itself. I did not install any new programs or software of any kind. I have Norton security software, but this has been installed on my PC for 6 months without any problems. I have uninstalled Firefox3.6,10. And reinstalled it, but it does not solve the problems.

Chosen solution

The user agent string may have been modified, try resetting it as shown here - How to reset the default user agent on Firefox

Read this answer in context 👍 3

All Replies (2)

TonyE
TonyE
  • Moderator
more options

Chosen Solution

The user agent string may have been modified, try resetting it as shown here - How to reset the default user agent on Firefox

reiner707
reiner707 Question owner
more options

Thanks !