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由 ShopsinMilwaukee 发表于 Feb. 6, 2019 ·

Added it to Thunderbird 60.5.0 and it did nothing at all

这个评论是针对附加组件的一个早期版本的（1.7）。 

作者 Paenglab (开发者) 日期 Feb. 6, 2019 ·

Have you tried to right click on the main toolbar and then choose "Customize"? Then you can move the buttons you want to the left of the first tab.

Without customizing this extension does nothing.