Firefox needs to focus all their effort on making a good web browser first . If the browser is slow, has a clunky interface, or lags behind on features, then people won't use it. Mozilla focus way too much of their attention on privacy and non-browser related projects. Look at how much attention that The Browser Company has gotten for their Arc browser on Mac. Their primary focus is great UI and making an excellent b…
TLDR: Firefox is a good web browser. It's not failing in the market because it's not a good browser. It's failing because consumers don't seem to actually care one way or the other.