Firefox's acceptance is growing by the day. It is not distant that it will leave IE far behind browser wars.. Tabbed browsing and support for extensions have done to browser wars what Windows did to OS wars.. 10 tabs are certainly better than 10 windows...
U must have seen various sites in firefox by tabbed browsing but have u seen Firefox inside Firefox...
chrome://browser/content/browser.xul
type the above line in the address bar in firefox and see the magic
the ability to add and write extensions to firefox is one of the best features which i like a lot