I would like to know if an Electron application embedding the flash player will continue working also after the Flash EOL.
As I know there are two deadlines here:
1 Jan 2021: Chrome should block flash plugin. Does this extend to the chromium browser embedded in an electron application?
12 Jan 2021: Flash player will stop running flash content. Does this extend to the flash player eventually embedded in an Electron application?
Embedding and distributing Flash Player in your desktop application without a redistribution agreement from Adobe would be in violation of our EULA.
You can set the system date on your machine forward to 13 Jan 2021 to see what happens, but I believe that it should stop working. Future versions of Chrome and Chromium will remove PPAPI support entirely. I imagine that will propagate to Electron at some point, so you'd most likely also end up in a position where you're stuck and unable to take updates to Electron.