Z 1 z 5 hwěžkow pohódnoćeny

wot ShopsinMilwaukee dnja Feb. 6, 2019 ·

Added it to Thunderbird 60.5.0 and it did nothing at all

Tute pohódnoćenje je za předchadnu wersiju přidatka (1.7). 

wot Paenglab (wuwiwar) 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.