Stop doing weird campaigns, or rather anything unrelated to building a browser.

Rehire the servo team.

Focus on the devs.

There was a time, when firefox with the firebug plugin was the dev tool for the web.

So people made sure websites worked in Firefox.

But since quite a while, chrome dev tools are superior in allmost every regard and the ff ones unusable to me.

Oh and let go of the expensive management. The one that openly talks about privacy, but ships FF with tracking and advertisment integrated by default. Stuff like this burned my trust.

So I still use FF, because chrome is not better in that regard, but that is the only reason.