User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0 Build ID: 20160825030226 Steps to reproduce: 1. Right click anywhere on a webpage to generate a context menu. 2. Move your mouse to anywhere else on the screen. 3. Right click again to bring up the context menu 4. WITHOUT MOVING YOUR MOUSE EVEN 1px right click to bring up the context menu a third time. Repeat steps 3 and 4 (after first doing steps 1 and 2 at least once) as many times as desired to recreate the issue. Actual results: The context menu goes appears in the location that it is clicked in step 2. (Stays in the same wrong consistent location until browser is restarted). Expected results: The context menu should have appeared where I was actively clicking and not at a past location.
Well I don't know how to edit what I said above so I'll just comment it here. Before doing step 4 right click to disable the active context menu (again without moving your mouse even 1px).