I've been using SiteAdvisor for a long time now and am grateful to use it. But recently something happened on my computer that my Siteadvisor disappeared from my Firefox browser (2.0.0.11). When I reinstall Siteadvisor, everything seems to go fine and I restart Firefox, and then siteadvisor usually reappears in the status bar where it should be. But if I close Firefox and restart again, no more Siteadvisor! It's not listed in the add-ons anymore either.
I should mention that I did a complete uninstall and reinstall of Firefox in case it was something corrupted with Firefox, but that didn't help--still the same problem.
Any ideas of what is causing the problem? On on Windows XP SP2. And I should probably note that SiteAdvisor still works with my IE7.