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.
they were explaining what happens with a proxy server, but with only a VPN there’s no proxy server or other such decrypting middleman. but in short: TLS was made to protect against exactly this: the network between. only thing leaked is the domain you are connecting to