I looked into it further at one point, there’s some other change that needs to happen before that feature can me implemented. The issue was documented over a decade ago… but I’d have to learn a ton about how FF works to even start to understand how to make the changes needed.

I can say that for now, the logic is pretty basic, hide the tab, attach a little screenshot of the tab to the cursor, create a window with the content of that tab if the mouse is released outside of the browser window.

Maybe I’ll dig into the code again at some point