Rated 5 out of 5 stars

le T-Mon ar Noll. 30, 2019 · buan-nasc

This extension does exactly what it says it will do, and minimizes Thunderbird to the taskbar. I have been using a hacked version of a prior extension that did the same thing. Nice to see a current extension with this capability. If you prefer to minimize to tray, partner this extension with ThunderbirdTray (available on GitHub). The two in combination work great.