What's the memory usage like? I don't think Electron is a good choice for a program designed to be run in parallel to demanding other programs like games.
As far as I'm aware, all launchers (Steam, Epic, Origin, etc.) use some form of a wrapped web browser. GOG Galaxy takes up around 65 MB when idle, while Steam uses almost 400 MB (yes, almost half a gig, I was surprised to see this number).