■拡張機能
Greasemonkey
https://addons.mozilla.org/firefox/addon/greasemonkey/
Tampermonkey
https://addons.mozilla.org/firefox/addon/tampermonkey/
Violentｍonkey
https://addons.mozilla.org/firefox/addon/violentmonkey/
FireMonkey
https://addons.mozilla.org/firefox/addon/firemonkey/
Userscripts.orgのミラーサイト (ミラー元の http://userscripts.org/ は閉鎖)
https://userscripts-mirror.org/
OpenUserJS.org
https://openuserjs.org/
Greasy Fork
https://greasyfork.org/