This build uses Jairo Boudewyn’s icons. It includes latest security fixes from the Aviary branch.
It has some Bugs i think .. see the comments on the Page

Update : Mozilla Firefox 1.0.6 Released
Download Firefox 1.0.6 for Windows - 4.60 MB

http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/1.0.6/win32/en-US/Firefox%20Setup%201.0.6.exe

More : Source