Rated 5 out of 5 stars

Sarre's link is a working non-official patch. Upon inspection, the only modifications to the code are the gmail login urls. See below.

< this._loginURL = "https://www.google.com/a/" + this.domain + "/LoginAction2";
---
> this._loginURL = "https://www.google.com/a/" + this.domain + "/LoginAction2?service=mail";
224c224
< this._loginURL = "https://www.google.com/accounts/ServiceLoginAuth";
---
> this._loginURL = "https://accounts.google.com/ServiceLoginAuth?service=mail";

And the version info...

14c14
< <em:version>0.6.4.1</em:version>
---
> <em:version>0.6.4.1.3</em:version>
30c30
< <em:maxVersion>4.0.*</em:maxVersion>
---
> <em:maxVersion>6.*</em:maxVersion>

Rated 5 out of 5 stars

There is a beta release that fixes this problem, but this site won't let me paste the url. Google for: gmail manager mozillazine 332634

Check page 156 for the url

This review is for a previous version of the add-on (0.5.7.4). 

Rated 5 out of 5 stars

The author has a beta fix here. It doesn't fix the auto-login when you click, but it does fix the checking of email and notifications.

http://www.longfocus.com/firefox/gmanager/releases/gmanager0575b1.xpi

This review is for a previous version of the add-on (0.5.7.4).