Source: WikiPedia
Mozilla Firefox (abbreviated officially as Fx, but also unofficially as FF) is a web browser descended from the Mozilla Application Suite, managed by the Mozilla Corporation. Firefox had about 15% of the recorded usage share of Web browsers as of January 2008 making Firefox the second-most popular browser in current use worldwide after Internet Explorer.Firefox uses the open-source Gecko layout engine, which implements some current Web standards plus a few features which are intended to anticipate likely additions to the standards.
Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and a search system that uses Google. Functions can be added through around 2,000 add-ons created by third party developers;[2] the most popular include NoScript (script blocker), FoxyTunes (controls music players), Adblock Plus (ad blocker), StumbleUpon (website discovery), DownThemAll! (download functions) and Web Developer (web tools).
Firefox runs on various versions of Microsoft Windows, Mac OS X, Linux, and many other Unix-like operating systems. Its current stable release is version 2.0.0.12, released on February 7, 2008. Firefox’s source code is free software, released under a tri-license GPL/LGPL/MPL.
No wonder why you want to use Firefox for your day to day browsing experience. But your network administrator has not given you required rights and you are unable to install this wonderful browser on your laptop/desktop. Pretty bad, huh!
Well, there is an easy answer to it without breaking any rules.
Browse to PortableApps and download Mozilla Firefox, Portable Edition. Install it on to USB drive (or any local writable folder) and ENJOY!
This technique can be useful even if you have administrator rights. With Firefox your private information (like cookie, history, bookmarks, cache etc) are stored on the disk and exposes some risk. My suggestion will be to create a virtual encrypted disk using TrueCrypt and install Firefox PE into that. Now you can relax because your private informations are secured using some strong encryption algorithms.
Cheers,