Then he got cancelled, and with it was cancelled the dream of having a real platform that can compete with Google. (Brave, with all of its advantages, is still a fork of Chrome and in that way promotes the Chrome monopoly.)
Since then, the new CEO of Mozilla has made herself a lot of money, and she seems perfectly happy to destroy the long term viability of the company for some quick injections of cash that can justify her bonuses.
And Eich single-handedly created the only other viable browser in the market starting from scratch [market wise, not technology wise]. Yet, somehow, people still think this was better than leaving Eich as head of Mozilla.