Works perfectly, does exactly what it says on the tin, unfortunately it requires a reset every time Firefox is closed.

Literally stops working and doesn't show up in the extensions button whenever Firefox is fully closed. Has to be turned off and back on every. Single. Time.

The only reason this isn't getting 1 star is because it does work flawlessly, if not for a complete lack of consistency between sessions.

EDIT: Now it just works? I didn't do anything, just updated the extension when it prompted, and now it just works. Its been a few days and the problem hasn't persisted, so I don't know what happened.