The addons and features of Firefox are "neat" but once you've added one, you're bound to add another, and yet another, and yet another. It's like with tattoos, you can always get "one more"... and then, before you know it, you've got an over inflated and unstable pile of addons that you don't want to uninstall because they do "neat" things.
And then Firefox starts crashing repeatedly.
And then you start thinking of changing browsers, cause Firefox just isn't working out any more. But you want to be able to customize it, and use addons...
Me, I just want a stable browser that does the simple thing, lets me bookmark sites so I can go to them later and mill about the internet. Chrome's all that I need.
Until the addons come... oh gods... and themes..
And then I'll start customizing...
>.<