I don't think the poster is correct about this. Among other reasons, there is no "profit" from fingerprinting the browser. Fingerprinting the user allows for c

I don't think the poster is correct about this. Among other reasons, there is no "profit" from fingerprinting the browser. Fingerprinting the user allows for collecting user data that can be sold. Fingerprinting the browser has no such benefits -- the browser checks are usually done so that site "looks good" for an average user, and the amount of users who use rare browsers _and_ spoof their user agents is too small to care about.