You've been there: browsing on a slightly backwater website, crossing your fingers as you click what looks like a video's play button. Instead of the TV show you had queued up, a million pop-ups spew out. The page you were on morphs into a Caribbean timeshare ad. It's the sort of misdirection that Google aptly calls an "unwanted behavior." And on Wednesday, the company's Chrome browser team announced a series of fixes that attempt to block these sketchy shenanigans.

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