Remi released new versions of Firefox for Fedora 15, 16 and Red Hat Enterprise Linux 6 and clones. The new update (firefox 20) improves performance and resolves a few critical security bugs but also adds some new features like the new download “experience” (which is now basically the same as with Chrome) and the changed private browsing settings.
I don’t particularly like the fact that now Firefox displays ‘Private Browsing” atop of any browser window even if the private mode wasn’t specifically enabled in the Tools menu (or by CTRL+SHIFT+P), so if you use the “Never remember history” option in Edit–>Preferences–>Privacy–>History the “Private Browsing” title will always be displayed.
To install Firefox on EOL releases of Fedora or RHEL6/CentOS6 you need the Remi package repository.
yum install http://rpms.famillecollet.com/remi-release-15.rpm
yum install http://rpms.famillecollet.com/remi-release-16.rpm
rhel6 / centos6:
yum install http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
To update the current firefox installation simply run:
yum --enablerepo=remi update firefox
Firefox 20 Release notes