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Re:YouTube change served lower-quality video to Firefox 43 f... by pdkl95 on Sunday January 10, 2016 @08:23PM (#10878219)
It's not the only data that is available for deriving a tracking key.

https://panopticlick.eff.org/

Why are you pretending that there is some sort of difference between "tracking a user" and "tracking the user's browser", which is close enough for most tracking purposes? Tracking the browser is tracking a user for a vast majority of people. For browsers on a phone, it is even more likely to be a 1:1 mapping.

Re:YouTube change served lower-quality video to Firefox 43 f... by andrewguenther on Sunday January 10, 2016 @11:27PM (#10878806)
The user agent (by itself) provides you none of those things....

> Why are you pretending that there is some sort of difference between "tracking a user" and "tracking the user's browser"

I'm not? That isn't what I said.