Good luck, a lot of people have noticed problems with a touchpad and Firefox. I am pretty sure it is a bug. I gave up and just use a mouse.
If you search the Firefox forum at
http://forums.mozillazine.org/index.php
you will notice a couple of long threads. Although most of them involved people using windows.
There a couple of ways you can try to tackel the problem. Try looking for one of the following packages. (Sorry I know nothing about Fedora other than it is based on RH).
xfree86-driver-synaptics
tpconfig
qsynaptics
ksynaptics
cpad-common
Either ksynaptics or qtsynaptics should help you configure the touchpad. Or you can manually edit the xfree86 config file.
Hope some of this helped.