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Web dev: What browser is visiting the page?
User agent string:
A screenshot of a browser. The URL bar reads firefox://settings, a button on the URL bar is labelled Netscape, a popup from the button reads: “You’re viewing a secure Opera page”, and the web page title reads “Chrome settings”.
Youtube currently (for weeks now) does not work on Firefox, if you don’t use a Firefox user agent. Google doing sketchy things again.
I’ve not run into this issue and use Firefox exclusively with ublock origin
I use Charmeleon, with the effects described above.
So you don’t use Firefox, you mess with Firefox. That’s on you then. Devs can’t be held responsible for you intentionally breaking things. Only do what you know works.