Rated 4 out of 5 stars

A nice and minimal Add-on for people who often have to change their proxy settings.
But i have 2 things which could be improved:
1.The Icon should be placed near the adressbar.
2.It would be cool if you could quick edit the proxy settings on middle click.

This review is for a previous version of the add-on (1.6.1-signed). 

Toolbar button

Toolbar option will be available shortly in version 1.7 for Firefox. You can edit the proxy settings by right-clicking the icon.