After remote disconnect, ask the user if they want to revert proxy settings.

In any case where the disconnection is not triggered by the getter, make sure the getter is made aware of the disconnect. A tab is opened that asks if they want to revert their proxy settings.

The user-facing text is just my first attempt at communicating what's important, and it should change once we have a better idea of the key info to present on disconnect. 
I think we should remove the "No" button.  If the user clicks this, their Chrome/FF will appear completely broken, and I'm worried users might click it not understanding what it does.

Also if their connection broke, they may not be able to successfully start another proxy (might especially be true for Facebook where we could end up proxying social networking messages in addition to other chrome traffic - meaning they couldn't restart a new proxy until their proxy settings are cleared)