flash replacement possibly?

Good day, maybe you will find my topic helpful for yourself

https://community.adobe.com/t5/Flash-Player/A-Second-Life-for-Flash-games-IceStone/td-p/10627768

There's not a great universal solution for keeping legacy content alive.  Having a player that plays the content is one thing.  Keeping all that content online when there aren't common browsers that have Flash Player available is another thing.  It's ultimately up to individual content providers as to what they want to make available on their servers, but content that nobody looks at is the kind of thing that you'd want to prune over time.  Simple content is going to be easier to archive and easier for third-party players to render well.  The more complex things get, the less likely it is that you're going to be able to just drop it into a third-party player and have it work, or be able to archive it without having access to the actual server that runs the backend.

Depending on what the content is, there are some solutions for cross-compliation to other technologies like HTML5 and JavaScript.  (e.g. Apache Royale for Flex apps, Adobe Animate for Flash-based animation), but games tend to be complex and timing-sensitive in a way that makes the emulation challenge harder.  It's definitely possible to write a Flash emulator, and the SWF specification is public, but little subtle differences to timing and performance can totally make or break a game in a way that it might not matter if you were just building interactive graphs or something.

There are third party flash players Gnash and Lightspark and a standalone program to host NPAPI and emulate the conditions of the original webserver useing a backup of the files as long as the corect urls are entred these can for the most part be run offline.