[Feature] Option to Automatically Disable Proxy if not connected to Mullvad

[ncorder]

Hello everyone,
I use the proxy functionality with the extension and it is immensely useful.
The only issue is that sometimes I turn off Mullvad for one reason or another and get confused as to why I can't use my browser.

It would be excellent if users could disable/enable if the browser would disable connections when not connected to Mullvad.

Thank you so much for all of your time and energy making such a wonderful extension.
—Best