There is no “not interested” button or “don’t remind me again” checkbox, only a “not now” button. This implies the pop-up could return. I also couldn’t find anything in the settings to permanently disable VPN features. Perhaps the ad won’t ever return, but it very much looks like a dark pattern and gives the impression Firefox isn’t giving me the choices I want.

Good job, Mozilla! But Edge isn’t the only browser resorting to dark patterns nowadays. Think you might be able to so something about this?

We built it first on PHP and later Node.js. It was clear from the start we had no idea what we were doing.

If you’re interested in that sort of thing, look for a job in “data annotation”.