At Leaning Technologies, we are working on preserving _all_ flash content by running the original x86 Flash plugin via WebAssembly virtualization (CheerpX). If you want to read more:
https://medium.com/leaningtech/running-flash-in-webassembly-...
https://medium.com/leaningtech/preserving-flash-content-with...
A presentation about the architecture of the system: https://www.youtube.com/watch?v=7JUs4c99-mo
Feel free to drop me any question: https://twitter.com/alexpignotti