This file is indexed.

prerm is in firefox 28.0+build2-0ubuntu2.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
#!/bin/sh

set -e

MOZ_APP_NAME=firefox

if [ "$1" = "remove" ] ; then
    update-alternatives --remove gnome-www-browser /usr/bin/$MOZ_APP_NAME
    update-alternatives --remove x-www-browser /usr/bin/$MOZ_APP_NAME
fi