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由 oldstupidcat 发表于 Oct. 17, 2021 · 永久链接

So, as far as I can tell, this DOESN'T work on Thunderbird 9x.x.x. It won't come up. Probably a XUL/early XML issue.
I've been trying to stay on 78.x for this reason but an auto update this morning made it break on my system. Was hoping an update was forthcoming.