[millstone]

"Enabling multiple browsers" is a red herring. Android enables multiple browser engines, but non-Blink browsers are a rounding error; it's bought nothing in terms of browser diversity.

Really it's just code for "let me, a web developer, target Chrome only, so I can just tell Safari users to install Chrome."

[enos_feedler]

Exactly. Run into this problem all the time on Mac with things like Youtube TV and Stadia.