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 V4 is not compatible with osx 10.411. but it went ahead and installed itself without informing me. Now when I try to run firefox I get an compatibility error. How do I get the old version back?

  • 1 reply
  • 5 have this problem
  • 9 views
  • Last reply by cor-el

more options

Firefox V4 is not compatible with osx 10.411. but it went ahead and installed itself without informing me. Now when I try to run firefox I get an compatibility error. How do I get the old version back?

Firefox V4 is not compatible with osx 10.411. but it went ahead and installed itself without informing me. Now when I try to run firefox I get an compatibility error. How do I get the old version back?

All Replies (1)