Was an endowment needed for LibreOffice and Maria DB? I don't actually know how it happened with those two, but they both seemed to be more or less grassroots forks when people realised that Oracle won't ever be a good custodian. Perhaps a Firefox fork here could emerge in a similar way.
I don't know about LibreOffice, but my recollection was that MariaDB was initially less a reaction to Oracle actually having been bad for MySQL and more a fear that Oracle would potentially {be bad, close the product, ...}
