Rated 4 out of 5 stars

Does the job. I have a little request, to include the trailing slash in short url format:

https://accounts.google.com/

Instead of:

http://accounts.google.com

Because the second form is prone to auto-phishing as it also can match:

http://accounts.google.community-hack.net

This review is for a previous version of the add-on (3.0.1.1-signed.1-signed). 

Thanks. I'm happy to report that this is implemented in the upcoming version (it's in Mozilla's review queue, it should be out "soon").