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As others have mentioned, DNS is probably your worst enemy. It doesn’t take much technical knowledge to just create a DNS server and start logging all domains you’re accessing. Say, to tell mom how often you’re browsing porn or something.
Manually configuring DNS servers in your OS would resolve this issue, but also using VPN like mullivad would just bypass such worries with 99% certainty.
Or just keep using mobile data, because why not
Oh, yeah you’re absolutely correct. I was fixated too much on the DNS logging lol
DoH (DNS over HTTPS) or DoT (DNS over TLS) would fix that