Hi #Twitter, this “browser” 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 doesn’t. It’s built on the latest ESR branch of Gecko. That’s at most seven versions behind Firefox and same as Tor Browser.
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