I know the bouncing that you are talking about. Mine came with version.9 and some poorly coded themes.........but to have them without downloading anything sounds like a conflict with another program that bonds with browsers. Uninstall- sweep for viruses, spyware, malware- delete leach programs- and reinstall FF.
It is still hands down better than IE. I just with I didn't have to keep IE for all the IE only sites.
By leach programs, I mean tool bars, weather bars, etc.