I just think that Mozilla just does not get it. I am a user. I don't use any any add-on except the dictionary. I have been a Firefox user since Firefox 1.0.
I am about to stop using Firefox. You want to know why? Because the end user experience have become really painful.
Here are a couple of examples:
Apptab: Love the concept, but, since I have grouped with sub menus, I use the open all tabs feature a lot. Well, do that in an apptab and you get your bookmarks, rather than your apptab. Open a single bookmark, it jumps to a new tab, keeping your apptab. Stupid? Do you know how many times that happen? Solution, don't bother with apptabs.
Opening multiple tabs at once, the browser freezes for a couple of seconds.
Open a Facebook game, all tabs froze for a couple of seconds.
Since Firefox 4 I have much more complete Firefox crashes. Firefox simply quit. Restarting is also painful as Firefox try to stumble back to life.
One of the cool features of Firefox 3 was asking to save your tabs when exiting. Now it is gone without a easy tickbox setting to get it back.
These are just some of the reasons why I dislike Firefox 4 and beyond. Rapid release have done little to improve my Firefox experience. In the end, end users don't care about all the cool tech or cutting edge HTML5. They just want a smooth and great user experience. Firefox 4, 5 or 6 is it not.
So you want me to stick around, stop wasting time about defending stupid version numbers or rapid releases. Just built me a browser that works, where the driving force is the end user experience, security and stability.