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.

One of management's biggest jobs at a company like Mozilla is aiming developer resources at the problems that do address consumer needs. In the last few years, Mozilla hasn't really been doing that, so it sounds like they need new management because the current management isn't competent.

Mozilla already has a ton of useless products and features without a market fit due to incompetent management...