My university network security unit requires that the latest production 
releases of particular network applications be installed in order to 
minimize security compromises on systems attached to the university LAN. 
  These applications include typical web browsers and IMAP email 
clients, such as Firefox, Thunderbird, Opera, Chrome, and MS Internet 
Explorer (the latter I personally only run within MS Win, currently MS 
Win 7, under VirtualBox under Linux).

Opera and Chrome install from the respective source vendors.  However, 
both Firefox and Thunderbird are provided by TUV and thus SL, but at 
release versions considerably lower than the current release from 
Mozilla.   I have found a work around that allows the use of the tar.bz2 
installation from Mozilla on X86-64 SL6x, but one of our technicians 
mentioned the use of a repository (Remi) that evidently ports the 
current Mozilla production products to EL, including X86-64 EL6.  The 
relevant URLs appear below.

Is anyone using this repository and these RPMs, and if so, what is the 
experience of such use (e.g., are these faithful ports of the Mozilla 
production applications that perform the same as current production from 
Mozilla)?

http://www.if-not-true-then-false.com/2011/install-firefox-on-fedora-centos-red-hat-rhel

http://dev.antoinesolutions.com/remi-repository

Yasha Karant