Very useful extension, version 2.x is awesome! Rated 5 out of 5 stars
Version 2.0 of this plugin (currently in beta) works much better and comfortable. It have whitelist mode that not change auth on sites that you don't want. I recommend this extension for all that have many accounts in services.This review is for a previous version of the add-on (1.03.1-signed.1-signed).