diff --git a/contrib/extract-search-engines.sh b/contrib/extract-search-engines.sh
new file mode 100755
index 0000000..47cd2a0
--- /dev/null
+++ b/contrib/extract-search-engines.sh
@@ -0,0 +1,72 @@
+#!/bin/sh -e
+# Copyright 2021 Oliver Smith
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# Extract the search engine names found in your current Firefox installation,
+# and create a list suitable for policies.json that removes all of them except
+# for what's in remove_allowed_dirs(). Note that SearchEngines can only be
+# configured via policies.json in the ESR version of firefox.
+# Related: https://github.com/mozilla/policy-templates/blob/master/README.md
+
+remove_allowed_dirs() {
+	rm -rf \
+		ddg \
+		wikipedia
+}
+
+get_names() {
+	grep \
+		'"name":' \
+		*/manifest.json \
+		| cut -d '"' -f 4 \
+		| grep -v '__MSG_extensionName__' \
+		| grep -v '^form$'
+}
+
+get_names_localized() {
+	grep \
+		-A1 \
+		'"extensionName":' \
+		*/_locales/*/messages.json \
+		| grep '"message":' \
+		| cut -d '"' -f 4
+}
+
+get_names_all_sorted() {
+	(get_names; get_names_localized) | sort -u
+}
+
+print_json() {
+	local first=1
+
+	echo '        "SearchEngines": {'
+	echo '            "Default": "DuckDuckGo",'
+	echo '            "Remove": ['
+
+	get_names_all_sorted | while IFS= read -r i; do
+		if [ "$first" -eq 1 ]; then
+			first=0
+		else
+			echo ","
+		fi
+		printf "                \"$i\""
+	done
+
+	echo ''
+	echo '            ]'
+	echo '        },'
+}
+
+
+OMNI="/usr/lib/firefox/browser/omni.ja"
+TMPDIR="$(mktemp -d "/tmp/extract-search-engines-XXXXXX")"
+cd "$TMPDIR"
+
+unzip -q "$OMNI"
+cd "chrome/browser/search-extensions"
+
+remove_allowed_dirs
+print_json
+
+cd ~
+rm -r "$TMPDIR"