This tool will download and install Widevine systemwide for aarch64 systems. It performs the necessary configuration changes to make Widevine available for both Firefox and Chromium-based browsers.
Original fixup script by @DavidBuchanan314: https://gist.github.com/DavidBuchanan314/c6b97add51b97e4c3ee95dc890f9e3c8
Changes to support newer CDMs and vanilla glibc and install script by @marcan.