Sgt_Kickaxe - 9:09 pm on Jun 14, 2010 (gmt 0)
The best protection is limiting exposure to all of the potential threats.
Adobe and MS have 12 plugins in the addons folder by default on fresh firefox downloads. You can safely turn off 11 of them and not miss anything while closing 11 possible ways to get infected.
I'm not just saying that, one of them even has a warning on it that says "known to cause security and stability issues". Get rid of it.
From FF it's Tools->Addons->Plugins(not extensions, look at plugins), are you doing it yet?