I'd really like an option for opening in foreground\background depending on direction of the drag. (Cent browser says hello :) )

good addon, but when you want to drag a file from the window explorer into firefox, it does not open it, if you disable firedrag it works.

example: http://fr.tinypic.com/r/260bh2w/9]View My Video

please fix it

When installing, it says that the add-on can't be installed because it is corrupted. Is this an extension issue or Waterfox issue?

Firefox beta 52 no problem, Waterfox 51.01 does no install, something dameged?