Loggin multiple FB or Mail accounts with same Browser

Hi guy Z,Now we r going to logging in Multiple Face book acc with same browser.
Follow this steps & enjoy !
For Firefox User -

Add Multi-fox Addon following this link
http://br.mozdev.org/multifox/







For Chrome user -

It is very easy way need to doing.

Hit CTRL + SHIFT + N  on your chrome browser
then open incognito.
More about incognito mode