Adobe flash will reach End of Life by December 31,2020 and will no longer receive any updates nor will be maintained. So it is advised to uninstall or remove Adobe flash from your computer. Instead of using Adobe Flash you can now use HTML5, WebGL, and WebAssembly that is inbuilt in your browser as an alternative to Flash.
Reference:
1. https://www.blog.google/products/chrome/saying-goodbye-flash-chrome/
2. https://blog.mozilla.org/futurereleases/2017/07/25/firefox-roadmap-flash-end-life/
3. https://developers.facebook.com/blog/post/2017/07/25/Games-Migration-to-Open-Web-Standards/
4. https://www.adobe.com/products/flashplayer/end-of-life.html#
