I wonder if Mozilla went through this: "It is possible that there may be Mozilla source files containing contributed code for which the copyright holders refus

I wonder if Mozilla went through this: "It is possible that there may be Mozilla source files containing contributed code for which the copyright holders refuse to grant permission for relicensing under the MPL/GPL/LGPL triple license. In those cases we will investigate whether the situation can be resolved by someone writing new code to replace the code which cannot be relicensed. (This may require writing a complete new source file, or simply rewriting one or more portions of an existing file.)" https://www-archive.mozilla.org/MPL/relicensing-faq.html#permission-not-granted https://www-archive.mozilla.org/MPL/relicensing-faq.html#per...