This file is indexed.

prerm is in netsurf-fb 3.2+dfsg-2.2build1.

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" ]; then
    update-alternatives --remove netsurf-browser /usr/bin/netsurf-fb
fi