A simple one, uninstall this browser with the software management tools.
only problem is, some dip has made it a REQUIREMENT for half the software in the distro.
I use Mozilla Suite, not Firefox, I do not want Firefox installed at all.
so some dip's idea means either build from sources ripping requirements for firefox out of the distro, or switch distros.
bad enough that we get stuck with graphics under console unless we edit the boot options after install, now we are being treated to M$ style crap and having unwanted software forced on us.