this post was submitted on 19 Feb 2022
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I find this argument to be too extreme. Librewolf already acknowledges that it still needs to connect to some essential services but tries to minimizes which.
content-signature-2.cdn.mozilla.net
for example is necessary for OCSP (and HTTPS) to work, I've seen some blocklists block it in the name of "blocking telemetry" but it causes massive breakage. Just listing domain names isn't a very useful argument.For HTTPS you can rely on local CA-Certificates perfectly which are upgraded by the OS.
The problem is that your offline CA stores won't use OCSP revocation logs or certificate transparency. You need live updates for those. The latter is especially important, as without it you're completely dependent on one group of CAs.
Usually not so fast, download a list is still needed (e.g. if there are security problems with some CA). IMHO, a completely "mute" browser isn't necessarily good, but of course every connection should be explained
If you're concerned about your browser "phoning home", you can find out exactly what it's chattering about using key logs and a packet sniffer (I recommend Wireshark or derivatives). Key logs are required for decrypting TLS traffic, and Firefox + Chromium support them.