Let me pay for Firefox

If you want to help fund Firefox, you can for now just pay for a product https://www.mozilla.org/en-US/products/ and not use it (if you live in a country Mozilla accepts money from). Be vocal about it that you do this to support Firefox (e.g. reply in the discourse thread). I personally recommend leveraging MDN for this as it's right now the closest to Firefox, as in it's part of the Firefox organization within Mozilla. I would hope down the road we could just directly for Firefox, but we need to put money where our mouth is.

I was going to respond with my usual point that money paid to the Mozilla Foundation cannot legally be used to support Firefox, but it turns out you're right: MDN and several other products are actually part of the Mozilla Corporation. The exception seems to be Thunderbird, which is MZLA Technologies Corporation.

The VPN product is very good, it's basically a thin wrapper around Mullvad, arguably the best VPN on the planet right now. At least from a privacy standpoint.

It's not anymore. They blocked port forwarding which interferes with torrents, are moving away from OpenVPN which I need.

In my opinion they are well on their way of enshittification and I moved to protonvpn.