I'm currently typing this on a build of Chromium 93 (official Chrome is at v91) running on Mac OS X Mavericks (released in 2013, incompatible with Chrome 69+),

I'm currently typing this on a build of Chromium 93 (official Chrome is at v91) running on Mac OS X Mavericks (released in 2013, incompatible with Chrome 69+), running on a self-built PC with an Intel 4790K. I replaced Mavericks's default AppleColorEmoji font with an updated version from Big Sur, but my system font is of course Lucida Grande. I have a working copy of Widevine. I would expect most websites to assume that my machine can't exist. But I don't have any problems with captchas.