That requires evolving to embrace the strengths of the non-web mobile app ecosystem -- which means evolving away from the web as Mozilla sees it: dom/js/css/html.
If you accept 'the web' as more of a conceptual ideal of openness, then there's a lot more room for innovation.
The problem is, at its core, that the people who are best suited to change the way the web works, are the developers that stuck it out through learning JavaScript, HTML, CSS, and browser quirks, and then spent the years required on top of that to begin working on the browsers themselves.
Of that self-selecting group, how many of them are likely to want to voluntarily rework and/or abandon core web technologies?
On the other hand, Chrome, existing to further Google's interests, has every reason to employ whatever creative technology solutions are necessary to improve the user experience, even if that means changing or abandoning the legacy web technology stack in the process.
What? Mozilla very much has a reason to want the web to evolve, in order to stay competitive with the various non-web mobile app ecosystems.