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由 Firefox 用户 cab87a 发表于 Jan. 18, 2020 ·

It says it works with Message Filters, but when i choose the 'Mailbox Alert', it is BLANK on the right side, so you cannot choose the alert.

这个评论是针对附加组件的一个早期版本的（0.23.1）。 

作者 Tjebbe (开发者) 日期 Jan. 21, 2020 ·

Yeah, that was (I hope) the last thing that broke with the big Thunderbird changes, and the hardest one to get working again. I finally found a way to fix it, and it should now work with version 0.24.