Flash Player will stop loading content from the open web on January 12th. Adobe has already shipped the last Flash Player update, and we officially end support on December 31.
Like your web browser and operating system, Flash Player is tasked with processing untrusted content. We're constantly hardening the product to stay ahead of the latest security research and intelligence from the field. That work stops on December 31. We'd highly recommend that you uninstall it, just to be on the safe side.
There's a little complexity in terms how Flash gets distributed and uninstalls.
For copies of Flash Player distributed by Adobe, you can run our uninstallers:
Uninstall Flash Player - Windows:
https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html
Uninstall Flash Player - Mac:
https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html
Google bundles a copy of Flash Player in Chrome. Flash is disabled by default, and a future update to Chrome will remove support for PPAPI plug-ins in general, and remove the encapsulated copies of Flash inside Chrome.
On Windows 8 and higher, Microsoft ships a copy of Flash Player for Internet Explorer and Legacy Edge. That version of Flash Player can only be updated or removed by Microsoft. There's a patch available that you can run manually to remove Flash: https://support.microsoft.com/en-us/help/4577586/update-for-removal-of-adobe-flash-player. If you do nothing, Microsoft will eventually make this patch mandatory and it will run automatically.
For modern Chromium-based Edge, it works like Chrome. Microsoft bundles a copy of Flash Player in that browser, and they'll eventually remove it in a future update.
Hope that helps!