Once this happens I will leave Firefox after being one of its strongest supporters for years. What makes Firefox worth it is the level to which I can customize it and this will knock out 5 of my must-have add-ons in one shot. When you do that you have nothing but a Chrome clone left and why use a Chrome clone when you can use Chrome. I hate Chrome because I feel locked in on UI design (old-school user here). Once FF takes away my options guaranteed I'll abandon it.