The easy way to enable installation of packages, adapted from [Mozilla's guide][1].
Files should be saved to /etc/apt/preferences.d/mozilla-ppa
and /etc/apt/sources.list.d/mozilla-ppa.sources
.
The PGP key is [Mozilla's][2], which you can compare to the one embedded in the .sources
file.
The fingerprint should match the required value 35BAA0B33E9EB396F59CA838C0BA5CE6DC6315A3
(as per their guide), which can be extracted like so:
grep -zoP 'Signed-By:\s*\K.*(?:[\r\n]+ .*)+' mozilla-ppa.sources \
| sed 's/^ \(\.$\)\?//' \
| gpg --show-keys