CookiePie is a Firefox 3 plugin that allows you to open multiple accounts for services like Yahoo, Gmail, Facebook or other services in different tab or windows.This really can HELP you  A LOT if you have multiple account for Gmail or Facebook.

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How to use it 

To use it,simply right click on your browser's tab and select "Toogle on/of CookiePie"

Supported Browser 

Firefox, Flock and GNU IceWeasel





Here Is A Video Of CookiePie In Action 







  

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