Hackourlives posted a tutorial about installing Firefox 4.0 Beta in Ubuntu 10.04
FoxTester extension provides a great and convenient way to install and test Firefox 4.0 beta in Ubuntu Lucid Lynx, it should also work on other *nix distributions as well like Fedora 13 and OpenSUSE. The installation and usage involves the following steps.Install / Test Firefox 4.0 Beta in Ubuntu 10.04 Lucid Lynx
Step 1: Download and install the FoxTester extension from the link [...]