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由 Bruce 发表于 Aug. 11, 2015 · 永久链接

This would be a better description, if:

In Mozilla Thunderbird, open Add-ons from the Tools menu.

I had a "Tools" menu. I probably do, but after chasing through a mess of menus and not finding it, I get tired and cranky. I know you are trying to be pure in spirit and true to the values of open source and all, but I just want to get my job done and this purity c**p gets in the way and instructions that don't work make it all the worse.