Latest version Firefox 5.0 Beta 1. In my experience, It is the best.
The latest version of Firefox is always considered to be "better." As of right now (3/28/2011), the latest and "best" version of Firefox would be Firefox 4.0.
No, but there is a generic Firefox Portable.
gNewSense (uses an unbranded version of Firefox called IceWeasel)Debian (uses an unbranded version of Firefox called IceWeasel)Nova (uses an ubranded version of Firefox called IceWeasel)LinuxTLE (uses an ubranded version of Firefox called IceWeasel)ESUN Linux (uses Epiphany)
You probably haven't updated your Firefox version. Check Menu Bar > Help > About Firefox to check the version. Firefox 3.5 is the version that offers HTML5 Video support. You can get the latest version at http:/getfirefox.com
The latest stable version is 25.0.1
3.6.27
This add-on is not compatible with your version of Firefox.
Your OS that you are on might not have an official version of Firefox yet.
Point your arrow to the Firefox word across the top of your screen. Scroll just one space to "About Mozilla Firefox", click on it and that box will tell you what version you have.
Version 1.0 of Firefox was Mac compatible from the bery beginning.
Firefox 3.6.12 or newer... 4.x or above are not supported...
I save all my bookmarks, download the new version, move it into the folder containing the older version, delete the older version, and open the new version, adding any bookmarks that were not automatically carried over.