Z 4 z 5 gwězdkow pógódnośony

wót Era dnja Okt. 30, 2016 · trajny wótkaz

The button must be added manually: right click on the toolbar, Customise ..., Drag and drop the Thunderkeep button in the toolbar.

I updated the project and fixed the issue in this new addon
https://addons.thunderbird.net/thunderbird/addon/google-keep-tab