Firefox 4.0 BETA Link:
Windows: http://mzl.la/9IYuSp
Mac OSX: http://bit.ly/99kB0R
Linux: http://bit.ly/99kB0R
Choose appropriate file for you Operating system and execute.
The installation is simple, and will not delete or remove anything from your previous version of Firefox, though your extensions may not be updated yet to work with Firefox 4. IF you really want to keep using extensions keep using your Firefox 3.x installation, which has not been touched.
Windows: http://mzl.la/9IYuSp
Mac OSX: http://bit.ly/99kB0R
Linux: http://bit.ly/99kB0R
Choose appropriate file for you Operating system and execute.
The installation is simple, and will not delete or remove anything from your previous version of Firefox, though your extensions may not be updated yet to work with Firefox 4. IF you really want to keep using extensions keep using your Firefox 3.x installation, which has not been touched.