Most major browsers will be dropping support for Flash Player in the coming weeks or months. This means that while you'll have an insecure Flash Player installed that's vulnerable to malware targeting publicly known vulnerabilities, you'll also be hard-pressed to find a browser that will run it for more than a few months.
We would strongly recommend that you find alternative content that doesn't require Flash Player, and take this opportunity to uninstall the vulnerable version currently on your system:
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
Here's the EOL announcement from 2017:
https://theblog.adobe.com/adobe-flash-update/
Here's the consumer FAQ:
https://www.adobe.com/products/flashplayer/end-of-life.html
Here's the enterprise FAQ:
https://www.adobe.com/products/flashplayer/enterprise-end-of-life.html