> With Mitchel Baker at helm, all the initiatives that would make Firefox more embeddable were cancelled to cut cost.

Will you name them? Mozilla cut embedding when Gary Kovacs was CEO. XULRunner, Graphene, and Positron were cut when Chris Beard was CEO. GeckoView was not cut.

I'm not a Baker fan at all, but no such initiative was cut under her leadership, because none existed.

Electron won not because chromium was more embeddable, it won because it made it easy to pull hundred of MB of nodejs dependencies. Everything else you could do already before with XulRunner...

> it made it easy to pull hundred of MB of nodejs dependencies

That's exactly what "more embeddable" is. It made itself easier to turn into Node.js, Electron, etc. I don't think it was a pure coincidence.

XulRunner existed before Electron. Node.js used v8, but could have use SpiderMonkey instead (this is what Gnome did). These were choices, not situations where using Mozilla tech was impossible. In the end that cemented Google stronghold on the web.