Not really that worried but rather curious about your opinions. Use what suits your demands best.
But for starters:
Electron is a framework based on Chromium used to develop desktop apps. Examples of apps that are built on Electron are Discord, Element Desktop, MS Teams, Slack, GitHub Desktop, Atom, VS Code and counting
Mozilla decided that PWAs are unnecessary, so I stopped using Firefox for PWAs. Chromium can install them just fine and it’s pretty much all I use Chrome based browsers for.
Many Electron based applications ship very old Chrome runtimes, I don’t trust them. Electron is usually more up to date than Steam’s browser engine, but that’s the best I can say about it.
Just had a throwback to when I jokingly wanted to watch YouTube via Steam’s overlay browser and YouTube complained about the browser being outdated.