works with this update Rated 5 out of 5 stars

Please go to this link http://webmailnotifier.mozdev.org/installation.html [developer's home page] and download section->
WebMail Notifier 2.9.12 - 2012-08-17

fixed gmail script
updated hotmail icon
updated forum links

Install the update and restart firefox.

Hope this helps!

This review is for a previous version of the add-on (2.9.11). 

Absolute Rated 5 out of 5 stars

This add has been part of my cyber life for quite some time now. Absolutely love this.
One carp though, if I have Gmail Priority Inbox enabled, this add-on fails to login / check for emails :-(
I understand that Google being a behemoth that it is, is hard to keep up with, especially when there's ONLY one guy behind this add-on.

Hopefully we'll have that priority mail tweak patched in to this add-on.

This review is for a previous version of the add-on (2.5.7).