To harden Firefox you need the following
from
https://addons.mozilla.org/en-US/fir...vacy-security/ NoScript
AdBloclk Plus
AdBlock Plus Popup Blocker
Ghostery
Better Privacy
Browser Protect (though there is a better version at
Browser Hijack Protection for free - BrowserProtect.org)
Some people also like to install WOT/World of Trust, though personally I've never bothered
from
https://www.eff.org/https-everywhere HTTPS Everywhere
if the paranoias really kick in, then these two programs are useful
Spybot S&D
Browser Hijack Protection for free - BrowserProtect.org Spyware Blaster
SpywareBlaster® | Prevent spyware and malware. Free download.
these last two are complementary - not alternatives - and both require manual updating a couple of times a week
In the tools > options>privacy settings for Firefox, set it to "do not track" and "never remember history"
Finally, in Windows Control Panel set Java to not keep temporary internet files.
Of course the assumption is that you have a working and up-to-date antivirus program on the machine
With that lot, Firefox should be as close to bullet-proof as its possible for a browser to be.. The only "extra" I can think of would be to disable Javascript in Adobe Reader
Comments anyone?