Explicit Button to allow camera access

[LilithWittmann]

We are getting more and more support requests for camera access because people rejected it once. An explicit button to grant it might help some people.

[BengtHagemeister]

Unfortunately programatically asking for camera access again is not really possible. All browsers handle this a bit differently but with the effect that the user itself needs todo some non-website specific action to fix this.

• Chrome (Chromium): Hitting deny will add the webpage to a permanent blocklist (chrome://settings/content/camera). The user needs to remove the page before requesting is allowed again.
• Firefox & Safari: Hitting deny (without checking "remember this" in firefox) will add the webpage to a temporary blocklist - which is emptied after the user refreshed the page.

Possible solutions:

• add a description (maybe even personalized to the users browser) to the NoPermissionsModal on how to ask for permission manually again.
• Only ask for the initial camera access after the user hits an explicit button. Therefore the user knows that the dialog is coming and does not click automatically on deny without reading the permission request (unfortunately the dialog is very similar to the location request, which a lot of websites ask for and has created a bit of an automation in people of clicking deny immediately).

Some more information on this topic: https://stackoverflow.com/questions/15993581/reprompt-for-permissions-with-getusermedia-after-initial-denial