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I don't really see it happening via Apple directly. Hopefully, of the fine developers here can create an app, that somehow works with the Safari browser, allowing people to turn on and off adblock as they see fit.

I have been seeing more and more website ads, not to mention more pop ups. This site is one that I was getting a pop up from, when I was running iOS 6.

Yeah, it will probably stay a jailbreak tweak. Its one of the 3 tweaks I really miss since I installed iOS 7.
 
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