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A comment on YouTube change served lower-quality video to Firefox 43 for 2 weeks. Parent comment

Re:YouTube change served lower-quality video to Firefox 43 f... by Dylan16807 on Sunday January 10, 2016 @07:50PM (#10878089)
The user agent header is not the place to look for those.
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Re:YouTube change served lower-quality video to Firefox 43 f... by cornstalks on Sunday January 10, 2016 @09:11PM (#10878363)
It shouldn't be the only input signal for determining those things, but it can definitely be useful (i.e. "this codec is only supported in vX.Y+ of this browser", or "vX.Y of this browser has a bug handling this type of video", etc.).

It's not like YouTube is a company of full of nothing but dopy idiots. I don't think they'd be using the User Agent if there was a better alternative.

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