Useful Firefox built-in resources

• resource://gre/ - root
• resource:// - browser root
• resource://gre/modules/commonjs/sdk/ - Firefox addon SDK
• resource://gre/modules/commonjs/sdk/test/assert.js - assert object used in SDK tests

Regular apt-get update

A canonical way to schedule regular apt cache updates is:

cat >> /etc/apt/apt.conf.d/02periodic <<EOF
APT::Periodic::Enable "1";
APT::Periodic::Update-Package-Lists "1";
EOF

Update-Package-Lists is an update interval in days. This works through /etc/cron.daily/apt