1420206 - I get NotAllowed error when trying to start screen sharing from a page created by an extension

Status: RESOLVED DUPLICATE of bug 1315029

(WebExtensions :: General, defect)

Description

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User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36

Steps to reproduce:

- I developed an extension, which opens a new page in a new browser's tab;
- Inside that page I using getUserMedia try to get an access to a microphone, to a video cam and to start screen sharing.


Actual results:

- Video/audio stream is retrieved without a problem.
- Screen sharing is not allowed.

The code I used:
navigator.mediaDevices.getUserMedia({
    audio: false,
    video: {
      mediaSource: 'screen',
      width: {max: '1280'},
      height: {max: '1024'},
      frameRate: {max: '5'}
    }
  }).catch(e => console.log(e));

The result:
MediaStreamError { name: "NotAllowedError", message: "The request is not allowed by the user agent or the platform in the current context.", constraint: "", stack: "" }


Expected results:

I assumed that screen sharing should have been allowed too.