FireFox allows you to run multiple User Profiles at once. This is great if you want to be logged into many social profile accounts at once, such as Google, Facebook, Twitter you name it. Usually you can only be logged into each of these one time. Even if you ran your browser multiple times you would still be forced to logout as one profile and login as another.
However with FireFox you can have multiple instances of the browser open and logged into different accounts all at the same time. By default this is not really the case, you need to create a shortcut to your FireFox program with some special tags to allow it to behave like this.
1. Start by right clicking on your windows desktop and selecting > New > Shortcut
2. When it asks you to type in the location of the item enter:
"C:\Mozilla Firefox\firefox.exe" -profilemanager -no-remote
Assuming FireFox is installed in C:\Mozilla FireFox (change as necessary.)
3. Hit next and enter the name for the shortcut.
Now launch FF and it should come up with the Choose User Profile manager.
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