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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

I downloaded the latest version of Firefox for my Mac OS X and after installation I am told it is not compatible with my version of Mac OS X. Can I go back to an older version of firefox? I am stuck without Firefox at all now.

  • 1 freagra
  • 2 leis an bhfadhb seo
  • Freagra is déanaí ó AliceWyman

more options

I Mac OS X 10.4.11

I Mac OS X 10.4.11

All Replies (1)

more options

The latest versions of Firefox require at least Mac OS X 10.5 and an Intel processor. You can revert to Firefox 3.6.xx for Mac 10.4 by downloading the installer from http://www.mozilla.org/en-US/firefox/all-older.html

More information in the Firefox won't start - find solutions article, under Firefox will not start on OS X 10.4 or earlier or with a PowerPC processor