Follow the instruction carefully and you will be amaze after (:

x: go to [You must be registered and logged in to see this link.]
x: at the very bottom , you will see the part about Personalization or simply click this [You must be registered and logged in to see this link.]
x: click the GREEN tab about getting the Persona thing.
x: Install and then Restart your firefox.

After you restart your firefox, you will be directed to the main page of Personas for Firefox and you will see the DIFFERENCE of what did the ADD do on your browser.

x: If you wanna look any Persona Designs click [You must be registered and logged in to see this link.]

For a preview on any design,
x: move your mouse over "Details"
x: if you wanna use it, click "Wear it"


Credit : Sheena Paragas