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This week I discovered the ηMatrix browser add-on. It presents a nifty user interface which gives you fine-grained control over what each website is allowed to transclude from other sources. You whitelist the elements that are necessary for the website to function, and leave the rest blocked. In particular, this makes it really easy to block things like those annoying modal dialogues that adblockers don't cover - but it can function as an adblocker or noscript in its own right.
