The performance of Fenix (the new version) is at least as bad as Fennec (the old version) for me.

Never forget that concurrent with the decision to move to a native Android UI for the non-Web parts of the mobile Firefox app (whereas previously it was using Gecko for the browser interface itself, just like on desktop), the powers that be were announcing/hyping Firefox OS—an entire mobile operating system that would "boot to Gecko", and where all apps would be required to implement their UI with this strategy that Mozilla knew have substantial downsides since they were already abandoning it themselves for performance reasons.

Left hand, meet right hand.

B2G and Firefox OS did some legitimately cool things - they still have a better blended app+web experience than anything mainstream that I've touched. Android's crappy instant apps are laughable in comparison. There's plenty to learn from that experiment(?).

The rest of it, yeah. Absolutely agreed. Electron not having a Firefox equivalent in particular strikes me as a major, multi-year... not oversight, that's far too polite. Self-ostriching? I'm continually astounded beyond words. The market is massive, and nauseatingly ripe for competitors.