That's indeed exactly what happened. Lots of moonshot products that were dead on arrival such as FirefoxOS (and TV/IoT) or BrowserID, features nobody really wanted, while taking away features that people did want. Even right now, with their "refocusing" they killed or stymied features/products that people do want or at least gave them some rep with the power users and tech people (aka the people who will later recommend/install the browser to/for friends and family), e.g. devtools and MDN.