This file is indexed.

preinst is in ubuntu-docs 14.04.3.

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.

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#! /bin/sh
set -e

if [ "$1" = upgrade ] && dpkg --compare-versions "$2" lt "11.10.1" ; then
        update-alternatives --quiet --remove-all firefox-homepage || true
fi



exit 0