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.

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

Firefox detects wrong version

  • 1 reply
  • 23 have this problem
  • 4 views
  • Last reply by cor-el

more options

My firefox is version 3.6 but on the addon page it thinks my version is 3.0.5. When I go to the about page on my firefox at the top it says 3.6.12, but in the box below it says <<Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.3) Gecko/20090824 Ant.com Toolbar 1.4 Firefox/3.0.5, Ant.com Toolbar 1.3 (.NET CLR 3.5.30729) >>

My firefox is version 3.6 but on the addon page it thinks my version is 3.0.5. When I go to the about page on my firefox at the top it says 3.6.12, but in the box below it says <<Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.3) Gecko/20090824 Ant.com Toolbar 1.4 Firefox/3.0.5, Ant.com Toolbar 1.3 (.NET CLR 3.5.30729) >>

All Replies (1)

more options

See * Web sites or add-ons incorrectly report incompatible browser

Check the general.useragent prefs on the about:config page.
You can open the about:config page via the location bar, just like you open a website.

Filter: general.useragent

If any general.useragent prefs are bold (user set) then right-click that pref and choose Reset.