From Fedora Project Wiki

Revision as of 19:12, 30 July 2010 by Sundaram (talk | contribs)

Firefox 4 is scheduled to be released only after the Fedora 14 release and hence Firefox 4 won't be in the official repository for that release. Tom Callaway has a repository available for Fedora 14 users that has the latest snapshot however. Download and place it in /etc/yum.repos.d.

Use PackageKit or run the following command,

yum install firefox4