Firefox is still heavily used by Linux OSes as the default browser. But I think that's mostly momentum at this point. If more people knew about Mozilla's organizational challenges, then I think Firefox would get ditched.
I think a tangential interesting question is: how many monthly active users does Firefox have, that choose to use Firefox? Not people who "click the internet icon", etc.
Like you, I suspect the brand recognition and loyalty is much, much lower than many people in this thread believe it to be. Not talking about among the highly-technical HN audience; just at large.
If they like the browser, why would they care about organizational challenges? Do Google's organization challenges cost them Chrome users?