The firefox3-3.5-0.2.beta4 package install this new version besides the version 3.0. So you will have 2 entries in the Internet menu. However, next build will overide standard firefox. Indeed, I will not maintain firefox 3.0 anymore (for Fedora <= 8). So, I recommend to switch quickly to this new version.

WARNING : a backup of your profile (.mozilla/firefox directory) seems mandatory.

Start by reading :

As always :

yum --enablerepo=remi install firefox3

No xulrunner update, this RPM provides his bundled Gecko engine.

Actually the some extensions are not compatibles and will be disabled.

I start to test the new features and I expect yours feedbacks.