Today, users of Minefield, the product of daily builds of the latest version of Firefox, as usual, automatically updated from 3.7 alpha 6 pre to a new browser build and saw the following in the "About Minefield" window:

The first build of Firefox 4, beta 1 build 1 visited FTP a little earlier, but it fixed bugs pretty quickly (
1 ,
2 ,
3 ).
')
You can download and see with your own eyes one of the most awaited browsers
from FTP Mozilla.org (versions for Windows x86, OS X x84 / x64, Linux x86 / x64 are available).
Direct link to the installer for Windows.
The final version of Firefox 4,
as promised according to the roadmap , will be released in November 2010.