Rated 4 out of 5 stars

Posted a fix for Firefox 3.5 - both Mac OS X & PC.

The plug-in still works fine for me, although the developer seems no longer reachable.

Workaround tips and *easy* instructions are available here:
http://www.macswitching.com/index.php/2009/07/03/how-to-fix-adsense-notifier-under-firefox-35x-mac-os-x-and-pc-version/

[thanks to dcphosting_services for the starting hints]