How to open more than one Facebook account in Firefox?

Sometimes we have more than 1 account Facebook and the problem in a browser that this is difficult. If we want to open two different accounts, usually the way we do is open it with different browsers. Now, with add-ons for Firefox CookiePie you can open 2 accounts up in a single browser.

Here's how;

First install the add-ons in http://www.nektra.com/oss/firefox/extensions/cookiepie/ CookiePie

click on Install Extension! contained in the link above and restart its Mozilla browser.

For example, you want to open 2 accounts up, open up your account with your first login, then go up again by pressing the Ctrl + T or click File and select New Tab, then on the tab that is empty right click, then select Toogle On / Off Cookie, now you can just login with a different Facebook account.

This method also can you do to Gmail, Yahoo Mail, Blogger or the like.

Hopefully useful.