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I want to know how to open the popup of my own extension out of the content script of a page? Somehow like the Chomecast (Google Cast) Extension does if you are on youtube and click on the cast button in the bottom right corner of a video on the youtube page.

I hope you have an idea. Thanks in advance.

ScientiaEtVeritas
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    You cannot*. The Chromecast extension can open the popup because it is whitelisted and can use `chrome.browserAction.openPopup` to do it. (*unless you switch to the Beta channel; on the beta channel any extension can use `chrome.browserAction.openPopup`. This is undocumented, so use it at your own risk.) – Rob W Dec 16 '14 at 11:48

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