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Screenshot extension injects ads

Posted on June 19th, 2014 at 7:55 AM EDT

One of my readers was recently having problems with advertisements being injected into web pages, and none of my ad removal instructions or my Adware Removal Tool helped. After almost a week of working on the problem, it turned out to be caused by one particular Safari extension: Awesome Screenshot. Of course, this led to a whole new kind of investigation!
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