Microsoft is ending support for Adobe Flash Player on Microsoft Edge (both the new Microsoft Edge and Microsoft Edge Legacy) and Internet Explorer 11. Adobe is working with licensing partner Harman to provide enterprises with support and security options for Flash. As more firms and websites move to HTML5, WebGL, and WebAssembly, the need for Flash has diminished. Using unsupported software risks having vulnerabilities that cant be fixed. It can also cause software compatibility issues as well as decreased system performance and productivity.”]
Source: https://www.csoonline.com/article/3583941/preparing-for-flash-and-office-2010-end-of-life.html