>never any chance that Mozilla was going to waste their very limited resources
Mozilla is many things, but "limited resources" Mozilla is not.
That is if they would stop paying their CEO their entire coffer, anyway.
>be the early adopters of an image codec when nobody is going to use it on the web until the browser engine with de facto control over the market starts supporting it.
The exact opposite mentality was how Firefox and then Chrome usurped the throne from Internet Explorer. Firefox is never going to usurp anything again so long as Mozilla is content to play second and third fiddle.