diff --git a/Makefile.extra b/Makefile.extra
index 2aa0f8d..b0c0951 100644
--- a/Makefile.extra
+++ b/Makefile.extra
@@ -30,3 +30,6 @@ download_extra:
 	mkdir -p config/includes.chroot/etc/firefox-esr
 	cd cache/downloads/user.js-dbu/ && make systemwide_user.js
 	mv cache/downloads/user.js-dbu/systemwide_user.js config/includes.chroot/etc/firefox-esr/firefox-esr.js
+	# https://addons.mozilla.org/en-US/firefox/addon/keepassxc-browser/
+	mkdir -p config/includes.chroot/usr/share/firefox-esr/distribution/extensions/
+	$(WGET) https://addons.mozilla.org/firefox/downloads/file/3465157/keepassxc_browser-latest-fx.xpi -O config/includes.chroot/usr/share/firefox-esr/distribution/extensions/keepassxc_browser-latest-fx.xpi