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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

I need to access a website that does not support any versions of Firefox beyond 3.x, how can I downgrade my webbrowser so I can access that site?

  • 1 baphendule
  • 1 inale nkinga
  • 2 views
  • Igcine ukuphendulwa ngu cor-el

more options

I recently upgraded to Mozilla Firefox 4.0.1 and now I cannot access web applications (Momentum from CGI Federal) that are only compatible with version 3.x. Is there a way to downgrade my version or run two different versions on one computer? If I can't downgrade I will need to run IE as my primary web browser.

I recently upgraded to Mozilla Firefox 4.0.1 and now I cannot access web applications (Momentum from CGI Federal) that are only compatible with version 3.x. Is there a way to downgrade my version or run two different versions on one computer? If I can't downgrade I will need to run IE as my primary web browser.

All Replies (1)

more options

You can use the portable Firefox version for such sites.

See http://portableapps.com/apps/internet/browsers/portable_firefox