Rated 5 out of 5 stars

This add-on works as described, so I'm giving it the full five stars, but the problem I've run into is that Thunderbird provides no way that I'm aware of to grant permission for Google Voice to access all of the audio devices on my system. I have to have Google Voice set up a certain way, as I have multiple audio devices. Not a fault of this add-on at all, it's a Thunderbird issue, but I wanted to put it out there in case anyone else runs into the same situation. If not for that, I would absolutely be using this add-on to keep all of my communications in one single window.

Rated 2 out of 5 stars

Meh. As with all browser tabs in TB once you're logged into one Google account, you can't add other accounts because all it does it open a blank page that goes nowhere. Without that these little buttons are worthless.

Rated 5 out of 5 stars

It works! I had been trying to get G-hub to work for months and it would always say "something went wrong". This just works. Nice work!