[nine_k]

> 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.

[fabrice_d]

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.