This is mainly an FYI.

It appears that after the Anniversary upgrade to Windows 10, the option to close all tabs in Edge is not working properly. When you have multiple tabs open and you attempt to close Edge you get a prompt asking if you wish to close all tabs but if you select the option to close them you will find that Edge will not close. Apparently this has been reported to MS as I found a feedback request when I attempted to provide feedback on this issue.