The source from this directory was copied from the theora
git repository using the update.sh script. The only changes
made were those applied by update.sh and the addition/update of
Makefile.in files for the UXP build system.

The upstream release used was https://gitlab.xiph.org/xiph/theora
The git revision used was 7180717276af1ebc7da15c83162d6c5d6203aabf.