There are loads of posts on this and they all miss out a couple of pieces of information

How ?
Well I downloaded the latest firefox fromfedora's update page, then I ran: (as root)

then from the directory I downloaded firefox to:

What happens Next ?
The first time I ran it, I got a pop up complaining about an install.rdf, I ignored this, and firefox loaded fine, but without any of my extensions in my profile. I then closed firefox, and the second time it ran by extension loaded :-) ..... finally I noticed that the beagle index extension wasn't loaded, so within firefox, I did a file open

and that seemed to do the job - Bring on the Java & Flashy plug-in goodness