I think the FF team should concentrate on making a browser that doesnt crash every 2 minutes first.
Which was put to addons
I am still on a year and not had the crashes you seem to have
Which in fact is something they have noted and they say they are going to have core library access for addons to help with load from addons.
Neither of us use any addons at all. We like a functional, efficient browser. Not one that tells you your heart rate, local weather, where to buy cats and dogs in your area and automatically adds smilies to your posts.
It crashes because its still buggy and they spend too much time on graphical tweaks. This latest release is much better, theres still a long way to go.
Comparing FF to IE though and saying IE crashes more is like comparing hamburger to fillet steak.