If you are enabling an add-on or installing/changing the theme in your firefox the effect will be seen only after the Firefox is restarted make you wish if there was a Restart Button like you get when you Install a Add-on.
And if you were working on many tabs, invariably you loose all the tab information and because you can't restore a session if you accept to close tabs
Here is a simple solution that make you wonder why didn't the Firefox think of this ?

A simple Firefox add-on called Restarter ! Now if you need to change a theme on your Firefox or need to enable or disable a firefox add-on / extention all you need to do is Click on Restart Firefox from File Menu.

» Get Restarter Add-on



You will be prompted to agree to close the open tabs, All you tabs will be restored once firefox is restarted.