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par Please read this !! le juil. 30, 2012 · lien permanent

Before you critisize : this is the best Gmail account manager on FF. Thing is it WAS, cause it is now not maintained anymore.

But as it is really a nice addon, Erik Nedwidek proposed its fork "Gmail Manager NG" that makes it working for current versions of FF.

Enjoy:
https://addons.mozilla.org/fr/firefox/addon/gmail-manager-ng/