In both browsers we detect touch and display the touch specific control bar, but no touch events are fired.
Edge does not support touch events by default. Enabling this can be done in the developer settings accessed by writing "about:flags" in the URL.
IE does not support touch events at all.
Some problems caused by this:
Causes our "Active mouse button" to not work.
In IE the cursor disappears after a touch because a mouseleave event is sent instead on touchend.
The cursor also disappears on Edge when touch event support is disabled but it might be related to upstream bug:
Se also bug 5779
Both IE and Edge claim to support PointerEvent. Perhaps touch works better with that?
Also see bug 7395.