CookiePie 1.0.3 : CookiePie is a Firefox plugin that keeps cookie records for different Firefox tabs and windows. Generally Firefox uses one cookie system for all it’s tab and windows instances, CookiePie just helps you to bypass this. Using this cookie extension, you ask Firefox to store different cookies on different tabs or windows. You can not only access multiple Orkut accounts but any other website that requires the cookie system.
CookieSwap : CookieSwap is an another Firefox extension that helps you to store and use different cookies on different tabs or windows. When you switch to another tab or window, the cookies get changed automatically and this will allow you to open as many Orkut accounts as you want on a single Firefox window.
