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.
Uhm, what? Maybe my ISP knows, but they are regulated (at least here). But VPN is a virtual direct-line to another server.