FF19 is not ready for Prime Time! Rated 1 out of 5 stars
No Sure what is the problem with FF19. But Morning Coffee does not work on FF19. Nor Does WOT, etc.
I would not recommend FF19. It is not ready for Prime Time.
It can not always be the Extension developers of the fault.
Firefox is the one at fault here. Their Name is on the product. They did what Apple did with their Map app. It was still in the developing stages and should have never been dumped on its users, period.