This extension was working great until recently. Not sure if it was an update to FF that broke it or what. My browser now shows the same tabs at the top as well. Im not sure how to get rid of those.

Everything works great! Though I can't make "Send tabs to other devices..." feature to work: sync is turned on, both devices are named and see each other in extension's settings. Guess I should log out and log in to set sync up again. Still great extension, the only one that does what I need