Here's a link... Rated 5 out of 5 stars

If you guys cant see the link in FF 3.6, use this link...

https://addons.mozilla.org/en-US/firefox/downloads/latest/1851/addon-1851-latest.xpi?src=userprofile

Then search for add-on called Compatibility Checker by Mozilla, it'll let it run even if it's not updated, YMMV.

This review is for a previous version of the add-on (0.1.8.1).