You can try out https://panopticlick.eff.org/ https://panopticlick.eff.org/, which estimates the entropy of information they can extract from your browser. For

You can try out https://panopticlick.eff.org/ https://panopticlick.eff.org/, which estimates the entropy of information they can extract from your browser. For me it's ~18 bits, which isn't great but probably enough to infer who I am if tracked across multiple sites. They don't even use the more exotic things like audio devices/codecs mentioned in the stack overflow question.