That does not help if you're using Chrome as your main browser, there's no cross-synchronization. Which I do because it's just way faster, and especially rogue tabs can't shoot down the entire browser including its UI.
e10s might be the thing that could save FF, but I fear that it's way too late.
There actually are some cross-sync addons out there, IIRC. Or at least there were; I used to use one when I was still in the process of migrating from all-Chrome to all-Firefox.
