Mozilla uses Google Widevine as well, I believe. The path forward is to license Widevine from Google, and they've already shut down other FOSS projects by refusing to give them licenses.
Like, if you forked FF, you wouldn't be able to display video either?
That is EVIL.
It means effectively there will never be another open source browser that can be display commercial-popular video, Firefox is IT, they have an open source monopoly? Oh geez.
Now might be a good time to do it, considering the lack of love for Google in EU these days ?