This was merely annoying until now, in a "guess I won't be reading that article or trying their site, after all" way, but I can't log in to an actually important site, GitLab.

Even when I disable both uBlock Origin and Firefox "Advanced Tracking Protection", I'm still blocked from GitLab by CloudFlare.

Testing with Chromium (same residential IP address as Firefox) in a "please violate me in every possible way" configuration, CloudFlare doesn't block me from GitLab.

But I really want to use Firefox for GitLab, and my Firefox doesn't have trouble with non-CloudFlare sites. For example, GitHub works fine with my Firefox. (But I'd really prefer to use GitLab, so long as this problem can be resolved and I'm not going to run into problems like this.)

I see a various complaints about CloudFlare blocking GitLab online, with various explanations. Sometimes, the user is blamed for not figuring out how they're not complying with whatever CloudFlare is trying to do (like the user is some divergent citizen, to be denied rights, in some Kafkaesque authoritarian police state).

I suspect that sites don't know when CloudFlare is false-positive blocking legitimate visitors and costing them customers...