Firefox’s free VPN will offer 50 gigabytes of monthly data, which is pretty generous for a browser-based VPN. A Mozilla account is required to make use of it, which isn’t a hardship (they’re free), but is a point of friction some may wish to know upfront.
“Just use Mullvad instead” is good advice compared to almost any other option.
Unfortunate that to get this experience in Firefox, we will have to disable a built-in feature and download some extension.
idk about you, but when I use a VPN I want all the device’s traffic to go through it, not just the browser. So I’d always disable the built-in feature in that case.