Drag-and-Drop of created X11-windows (pull out Firefox Tab) into windows

[ArneBab]

A feature I sorely miss is the ability to just grab a Firefox Tab and drag it into any Emacs/exwm Window to make the newly created Firefox instance show up there.

Wish:

• Condition: exwm with at least two windows
• Condition: Firefox with multiple Tabs in one window.
• Action: Drag and Drop one of the tabs with the mouse into the window that does not have Firefox.
• Expected (⇒ Wish): The window that held Firefox still shows the existing Firefox with the remaining tabs. The other window shows the new firefox with the dragged Tab.
• Actual: The new Firefox opens in the window of the existing Firefox.