Prevents HTML5 videos from auto-playing in new tabs on any page (not just YouTube) and pauses videos when leave tab. NOTE: On YouTube, click the main video area to play the video so don't have to click the Pause/Play button twice for the first time. From Dan Moorehead (xeonx1), developer of PowerAccess™ (http://PowerAccessDB.com) (https://twitter.com/PowerAccessDB).
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