mero_nam thank you very much for pointing out the fact. Firefox is build by developers in mozilla foundation. It is by far the best browser. Just go to firefox site and you will find tons of addons for firefox. My personal favourite are fasterfox, foxytunes,superdragandgo, dictionarytooltip. They also provide excellent javascript developement and debugging tools. If you want to become the part of firefox developement porcess then visit http://www.xulplanet.com , it will teach you how to build applications for firefox and other mozilla browsers. Njoy.