Adobe Flash Player Reached End of Life

What is Flash Player?

Adobe Flash Player is a web browser plugin users need to install to play rich animations, stream videos, and play games online. Adobe released Flash Player in 1996. With time Flash was installed in about 99% of internet-connected desktop computers. With Adobe Flash, web browser developers were allowed to create rich animations with small file sizes perfect for dial-up internet connections in the early years of the internet.
When smartphones appeared, Adobe was slowly reacting. Apple said that Flash players have security vulnerabilities and heavily consuming batteries; Apple used a particular ecosystem system to run videos and animations. While Adobe Flash Player for smartphones and tablets continued working, but it was not fully compatible. It did not work fully like desktop Flash.
As the internet grows, Facebook, Netflix, and YouTube started to stream videos to smartphones without using Flash Player. Then Adobe ends the development of Flash for mobile devices in November 2011. 
Adobe continued the development of desktop Flash Player. Still, with time going, Flash security vulnerabilities continued to be discovered so that in 2017 Adobe announced Flash Player end of life on December 31, 2020.

What is the future replacement of Flash Player?  

HTML5 is used to stream videos and audio without installing a plugin. It is a valuable option to use instead of the Flash Player.
Companies that rely on Flash for the development and playback of content are encouraged to remove Adobe Flash’s dependency before December 2020.
System admins need to force removing Flash Player from web browsers using Group Policies. Microsoft will remove Flash from all browsers by December 31, 2020, via windows update.
Users who use old browsers need to stop using Flash Player as soon as possible since Microsoft will not deliver security updates for Flash after December 31, 2020.

What will happen to old Flash content?

There is an open-source project called Ruffle, which is a Flash Player simulator written in Rust. Ruffle runs in all modern operating systems and browsers.
It avoids security vulnerabilities and high battery usage, which are the reasons that caused Flash Player to fail.
IT is easy to install; users and website owners will install Ruffle such that Flash contents display without additional configuration. The project aims to save internet history that used Flash Player, and a massive number of websites were using Flash Player.