Select the Settings cog at the top right-hand side of the window and select Manage add-ons from the menu that appears.
How to Enable Flash in Microsoft Internet Explorer:
Navigate to the website you want to enable Flash on.The steps below will show you how to enable Flash for a particular website in each of the major browsers in order to view content. Flash is still used in some platforms, such as OWL, and requires being enabled in most browsers in order to properly show content. Adobe Flash is a software platform for the browser that enables the display multimedia such as animations and other graphical content that is being phased out of active development.