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This is the best app. I use it so much and see that it has been evolved within the past time a lot. There is a small problem with the latest version which is when you file an email with it, you can not use Undo (ctrl+z) , It used to work on older versions. Thanks for checking that.

这个评论是针对附加组件的一个早期版本的(4.1.0)。  对这个附加组件,此用户曾发表过3个评价

Thanks or your review and your kind words.
Ctrl-Z does not work anymore due to a limitation in the Thunderbird extension API. It has been reported here: https://bugzilla.mozilla.org/show_bug.cgi?id=1671042

I think I will try to add a different shortcut to undo tidybird actions as a workaround.