I wish. Gecko is open source, so there's no technical reason another non-Chromium browser couldn't be created (which I think is important for the web ecosystem, avoiding browser monoculture, etc.). I suspect that no one has really done it because it would be a terrible uphill battle and there's no direct revenue to be had. Browser money comes from ad/search partnerships, which require a strong existing userbase, or just the userbase itself in the case of something like Chrome.