After a long wait, Mozilla has officially announced that their latest browsers, firefox 4 is ready for download. Mozilla claims that Firefox 4 are faster, safer, and more stable than previous versions.
Mozilla also says Firefox 4 can still be used on windows xp. So, if your Windows XP user, you can still use firefox 4.
Firefox 4 has a different look than previous versions, just like google chrome, the position of any browsing tab is at the top. Version 4 is also available for android mobile phones and nokia n900.