I'm sure it worked at some point. But sadly it has been broken for a long while.

NOT WORKING.

not working

It was awesome (5/5), but now it doesn't work :(

This add on doesn't do anything.

I was hopeful that this addon could enable the awesome "quick capture" feature that's offered by Things 3 on Mac with native Apple apps such as Safari or Mail. However, the addon (in its current state, November 2020) is completely broken. Clicking on its icon in the toolbar does nothing (FF 83.0) and the supposed keyboard shortcut Option+Command+S is overwritten by Firefox's native screenshot utility :(