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Re:Onedrive is slow on Linux but fast with a “Windows” user-... by pbhjpbhj on Wednesday March 22, 2017 @07:05PM (#13935901)
That commenter appears not to have heard of browser detection or UA sniffing, it has nothing to do with feature detection, they're a completely different method (and paradigm).

Nor should browser detection cause Firefox to follow a different switch in the code when on a different OS, not since about version 2 when I think there were bugs making that useful.

Really browser detection was something needed to handle MSIE way back in the day, or possibly other browsers before web fonts.

But this ain't browser detection, definitely not feature detection, it's OS detection - the system responds differently when only the OS in the UA string is altered.

Re:Onedrive is slow on Linux but fast with a “Windows” user-... by emodendroket on Wednesday March 22, 2017 @07:13PM (#13935949)
What he's saying is that they're using UA sniffing in place of feature detection (which is frowned upon these days but was common at one point).