It makes no sense to have an "Always share" action for screensharing, because the user needs to select each time which application will be shared, but it would make sense for the user to have a way to never be bothered again by a specific website showing the screensharing prompt.

Bug 1282768 exposed this in the UI without actually implementing it. I'm rediscovering this now that I'm writing a test to cover the UI in bug 1313324.

The associated test is coming in bug 1313324.

https://hg.mozilla.org/integration/mozilla-inbound/rev/ca8ca07756ab80d29778329aa22ebc453f17fc69 Bug 1037438 - implement persistent deny permissions for screen sharing, r=jesup,past.

Backout by cbook@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/7b6efd055620 Backed out changeset ca8ca07756ab

backed this out in https://treeherder.mozilla.org/#/jobs?repo=mozilla-inbound&revision=670ad168fb708a7eca83480419f6206833b2566e because of continued test failures like https://treeherder.mozilla.org/logviewer.html#?job_id=39930510&repo=mozilla-inbound maybe this need a try run to find out what was going wrong

https://hg.mozilla.org/integration/mozilla-inbound/rev/6992281f395d344cf6921297ecf83fe8df071188 Bug 1037438 - implement persistent deny permissions for screen sharing, r=jesup,past.

Steps to reproduce: 1. Load https://mozilla.github.io/webrtc-landing/gum_test.html 2. Click "Screen" 3. In the prompt, check the "Remember this decision" checkbox, and click the "Don't Allow" button. 4. Reload the page, and click the "Screen" button again. Expected result: no prompt should appear.

(In reply to Florian Quèze [:florian] [:flo] from comment #8) > Steps to reproduce: > 1. Load https://mozilla.github.io/webrtc-landing/gum_test.html > 2. Click "Screen" > 3. In the prompt, check the "Remember this decision" checkbox, and click the > "Don't Allow" button. > 4. Reload the page, and click the "Screen" button again. > > Expected result: no prompt should appear. This was incomplete sorry; I had forgotten that before this fix the screensharing permission was incorrectly saved as a camera permission. Add the following step: 5. Click the "Camera" button. Expected result: we should prompt the user to share the camera. Actual result without the fix: the camera request was denied immediately.

Tested on Mac OS X 10.10, Windows 10 x64, Ubuntu 16.04 x64 with Nighlty 53.0a1(2016-12-19) and I can confirm the fix, the user is prompted to share the camera.