Always Active Window Chrome extension spoofs page visibility, keeping tabs active and preventing tracking of inactive states for uninterrupted media playback. Download Always active Window (Always Visible) for Firefox. Pretend that all browser windows are active by spoofing the visibility state event. By injecting a small script into every webpage, it pretends that the tab is always in the active state, preventing websites from offering limited services only when the tab is active . One of the main benefits of installing this extension is that it ensures immediate playback of resources on webpages that check the visibility state before loading. Keeps all browser windows always active . Pretend that all browser windows are active by spoofing the visibility state event and more!