I've been using it for a very long time and it really rocks. Like many on updating to the new 57+ webextension version of the addon I was pretty annoyed as it didn't do what I was needing but I read your post and understood your pain & downgraded the extension. I truly appreciate the quick work you've done to make this addon work the same way as the old one, I went to firefox 57 today, and honestly it does everything I need and whilst I find the addon looks a bit cheesy and the UI could do with a bit of love, it works really well once configured and at the end of the day that's what I care about :)

P.S. can you bring back the spinning logo based on the color of the matched proxy?