1296954 - getUserMedia in WebExtension background page doesn't work (permissions required)

Status: RESOLVED DUPLICATE of bug 1278100

(WebExtensions :: Untriaged, defect)

Description

[Matt]

Attachment: Demo extension. Note that you can load the background page and the options page to compare the two scenarios.

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce:

call navigator.mediaDevices.getUserMedia() from a background page in a WebExtension


Actual results:

navigator.mediaDevices.getUserMedia() promise never resolves with no permissions dialog.


Expected results:

I would expect a permission dialog to allow these permissions. 

Alternatively, Chrome handles this by using the options page to get the permissions dialog. Then you can "always allow" these permissions and access them in a background page. An example Chrome extension that uses this flow is:
https://chrome.google.com/webstore/detail/mediacore-capture/enddmcjcfojolegmdogekfpfbobmkioo?hl=en