/usr/bin/dhomepage is in debian-goodies 0.69.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
#  Copyright (C) 2008  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along
#  with this program; if not, write to the Free Software Foundation, Inc.,
#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
VERSION="0.1"
version()
{
  echo "dhomepage version $VERSION"
  echo "dhomepage is licensed under the GNU General Public License"
  echo "version 2 or later"
}
usage()
{
  echo "dhomepage PACKAGE"
  echo ""
  echo "--version	Show version information"
  echo "--help		Show this help message"
  echo ""
}
PACKAGE="$1"
if [ -z "$PACKAGE" ]; then
  usage
  exit 0
fi
case "$1" in
	--help)
		usage
		exit 0
		;;
	--version)
		version
		exit 0
		;;
esac
HOMEPAGE=`grep-aptavail -PX $PACKAGE -s Homepage | sed 's,^Homepage: ,,' | sort -u`
if [ -z "$HOMEPAGE" ]; then
  HOMEPAGE=`grep-aptavail -PX $PACKAGE -s Description | \
    sed -n '/^  Homepage: /{s,^  Homepage: ,,;p}' | sort -u`
fi
if [ -z "$HOMEPAGE" ]; then
  echo "$PACKAGE has no homepage"
  exit 1
fi
for URL in $HOMEPAGE; do
    sensible-browser "$URL"
done
 |