One thing I have noticed was that some WAF rules are being set up to recognise Tor and to block it. Those implementing it are trying to protect their own access points to back office stuff, but it is out there.
The most common real-world application of browser fingerprinting that I have noticed, though was bot management. Browser fingerprints are used not to target people, but to identify malicious traffic and redirect it to a honeypot.
Now, I don’t think Firefox will cause problems for WAF protection with this, so good for them. It just ups the game for recognising the crawlers and other bots.
