We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

I upgraded to 4.0, was to new for G4, refused to load. I have dumped all I can find. Now can not reload 3.5. any help? Thanks Lee

  • 1 cavab
  • 6 have this problem
  • 4 views
  • Last reply by TonyE

more options

Firefox after installing 4.o when I tryed to use Firefox it refused and a round circle with a diagonal line across was over the Firefox Icon. It did give an error # but I do not have it. Lee

Firefox after installing 4.o when I tryed to use Firefox it refused and a round circle with a diagonal line across was over the Firefox Icon. It did give an error # but I do not have it. Lee

All Replies (1)

more options

Firefox 4 requires at least OS X 10.5 and an Intel Mac. There is a third party version of Firefox 4 that runs on OS X 10.4/10.5 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox

If you prefer, you can get the latest version of Firefox 3.6 from http://www.mozilla.com/en-US/firefox/all-older.html