This is my first addon review ever.

I give it 1 star, because at the current time it has no use for me. It's paid. You get nothing free. I suggest to make it at least 10 minutes/ 1 hours a day free vpn.

If you add free stuff, I will edit my review

Hello, I thought Proton VPN was a libertarian socialist, I wouldn't have expected it to make an add-on for paid users.

Open source and all that nonsense just as an excuse to get email addresses?

Lures you with free use (See Website with the big Button "Proton Free"), although it is only for payment, which you only find out afterwards when you have already registered your email address.
Privacy and honesty look different.