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Hi #Twitter, this âbrowserâ is the current Thunderbird release, a mail and RSS client. Its capabilities are no different from Firefox 78. How about you detect Gecko rather than detecting Firefox?
Better yet, do feature detection instead of UA sniffing: https://developer.mozilla.org/en-US/docs/Web/HTTP/Browser_detection_using_the_user_agent
@WPalant Does Thunderbird still depend on the (pre-quantum) engine? If yes, thats a valid reaction of twitter to block it.
@fabiscafe No, it doesnât. Itâs built on the latest ESR branch of Gecko. Thatâs at most seven versions behind Firefox and same as Tor Browser.
Just realized that the Twitter server responds with â400 Bad Requestâ here. Thatâs IMHO a very unconventional way of saying: âYour request is fine but I donât like the client you are using.â