If what I've seen from CloudFlare et.al. are any indication, it's the exact opposite --- the amount of fingerprinting and "exploitation" of implementation-defined behaviour has increased significantly in the past few months, likely in an attempt to kill off other browser engines; the incumbents do not like competition at all.
The enemy has been trying to spin it as "AI bots DDoSing" but one wonders how much of that was their own doing...