I recommend removing the Adobe Acrobat plugin from FireFox. Just last night while visiting a trusted site, it tried to launch an exploited Adobe Acrobat file. The file was served from a 3rd party ad site that had been hacked. Dangerous.
A government office which warns when widely used browsers have vulnerabilities – good idea or bad idea? I’m not really all that sure about that.
(But here’s a idea for you: find a way to keep the 4+ browsers I have installed in sync so that I can switch at a moments notice without any problems.)