Update: Firefox3 Beta 5 is now available for download.The latest beta version of Firefox 3, Beta 5 will be available for public download soon. This release is being tested by the quality team and Mozilla says it should be available in the week of March 31. This version contains many bug fixes, you can check out the release notes of Firefox 3 beta 5 for more info. This release is available in Mozilla FTP servers and can be downloaded from here.
Once the version is released you can download from the beta download page.
It’s already out: http://www.softpedia.com/progDownload/Mozilla-Firefox-Final-Download-5787.html
If you’re little more adventourous, then get the Pre Firefox 3 here: http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/
@Ashwin,
Its not officially out from Mozilla, If you check the image in the post, you can see that I have already downloaded the Beta 5 from Mozilla FTP.
I tried beta 4, but later switched back to 2.x because most of the add ons are not working with FF 3 beta 4
@Ram,
If you are using too many add-ons, most of them are not compatible.