diff --git a/4.1-Extensions.md b/4.1-Extensions.md
index bdfc55f..19a2bb6 100644
--- a/4.1-Extensions.md
+++ b/4.1-Extensions.md
@@ -28,7 +28,7 @@ These are all, where applicable, best configured to `deny-all` and whitelist.
 * [ClearURLs](https://addons.mozilla.org/firefox/addon/clearurls/) <sup>✔ Privacy (stated on AMO)</sup> | [GitHub](https://github.com/KevinRoebert/ClearUrls)
 * [Violentmonkey](https://addons.mozilla.org/firefox/addon/violentmonkey/) | [GitHub](https://github.com/violentmonkey/violentmonkey) <sup>1</sup>
   * Allows you to run [User Scripts](https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.2.1-User-Scripts) which can do neat things. There are Web Extension API limitations, such as handling strict CSP and @run-at document-start. So TEST your scripts!
-* [window.opener be gone](https://github.com/earthlng/testpages/raw/master/windowopener_be_gone-1.0-an%2Bfx.xpi) | see [issue #401](https://github.com/ghacksuserjs/ghacks-user.js/issues/401)
+* [window.opener be gone](https://github.com/earthlng/testpages/raw/master/windowopener_be_gone-1.0-an%2Bfx.xpi) | see [#401](https://github.com/ghacksuserjs/ghacks-user.js/issues/401)
 * [Request Control](https://addons.mozilla.org/firefox/addon/requestcontrol/) | [GitHub](https://github.com/tumpio/requestcontrol) | [Manual](https://github.com/tumpio/requestcontrol/blob/master/_locales/en/manual.md) | [Testing links](https://github.com/tumpio/requestcontrol/wiki/Testing-links)
 * [Redirector](https://addons.mozilla.org/firefox/addon/redirector/) <sup>✔ [Privacy](https://github.com/einaregilsson/Redirector/blob/master/privacy.md)</sup> | [GitHub](https://github.com/einaregilsson/Redirector)
 * [Cookie AutoDelete](https://addons.mozilla.org/firefox/addon/cookie-autodelete/) <sup>✔ [Privacy](https://github.com/Cookie-AutoDelete/Cookie-AutoDelete/wiki/Privacy-Policy)</sup> | [GitHub](https://github.com/mrdokenny/Cookie-AutoDelete)