User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0

Steps to reproduce:

1. Go to https://www.webrtc-experiment.com/getDisplayMedia/
2. Start the demo

Actual results:

The sharing indicator opens in the center of the screen

Expected results:

The sharing indicator should, at least for now, opens at the top or bottom of the screen to avoid hiding the webpage.

The attached is what I'm seeing on 79.0a1 (2020-06-15) Windows. The placement of the indicator was more of a surprise than an actual problem.

I immediately thought that this was broken, but I think that might be due to it lacking any indication that it belongs to Firefox. Partly that was placement: being outside of the window made it less associated with Firefox. It might need some sort of marking to distinguish it if this is the intended placement.

(In reply to Martin Thomson [:mt:] from comment #1)

It might need some sort of marking to distinguish it if this is the intended placement.

Good point. I didn't think about that scenario since I'm using a tiling window manager and firefox is always maximized.

I attached an image that shows how it looks on my side.

I couldn't reproduce this on latest Nightly on Ubuntu (Gnome and i3). Indicator opens in the correct position, which is bottom center.