"How it plays out will determine who has control over your smartphone."
I consider my smartphone to be essentially an extension of my penis. Does that mean that this will determine who has control of my penis?
Guaranteed it won't be me.
You'll notice about halfway down the page in the "cookies and other technology" section a discussion of interest based advertising, which is basically iAd's targeted at you based on your usage habits. The only way to opt out of this "feature" on an iOS device is to click on the link in that paragraph to http://oo.apple.com/ from Safari on your iOS device, which will bring you to a settings page that will allow you to disable "interest based iAds". I have not found a way to get to this setting page through the settings App (queue up the people who will promptly correct me).
There are assignable gestures hidden in about:config, and browsing is so much better once you find some customized combinations that you like. Here are the ones that I have altered and find helpful:
Swipe down: new tab
Swipe up: go home
Pinch in: close tab
Pinch out: toggle between full screen/not full screen
Rotate right: reload
Rotate left: undo close tab (for those times you accidentally pinch in)