Comment Re:Plugins (Score 5, Informative) 415
This is why they are encouraging extension developers to switch to the Mozilla addons SDK which provides API stability between firefox releases (and is built in in firefox 4.0+ ). the addon SDK also allows for installing plugins without restarting the browser!! YEAH!!!
now, have you tried installing the addon compatibility reporter?
https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/
with that enabled you can forcibly enable addons that claim to not be compatible and test to see if they work. Also it gives you a away to send feedback to the developer that "hey it works" or "no it doesn't". And of course if you haven't contacted the developers of those addons, then that could be why they haven't been updated.