chrome-gnome-shell 8 on Debian properly installs the Firefox stuff to /usr/lib/mozilla.
On Ubuntu, it installs to /usr/lib/x86_64-linux-gnu/mozilla which is bad because it's supposed to be an arch-all build. Also Firefox ignores the multiarch directories so installing there doesn't work.
chrome-gnome-shell 8 on Debian properly installs the Firefox stuff to /usr/lib/mozilla. x86_64- linux-gnu/ mozilla which is bad because it's supposed to be an arch-all build. Also Firefox ignores the multiarch directories so installing there doesn't work.
On Ubuntu, it installs to /usr/lib/