diff --git a/4.1-Extensions.md b/4.1-Extensions.md
index 2febbe1..98fb455 100644
--- a/4.1-Extensions.md
+++ b/4.1-Extensions.md
@@ -37,7 +37,8 @@ These are all, where applicable, best configured to `deny-all` and whitelist.
    * unknown: clearing service workers cache, appCache by host
 * [Temporary Containers](https://addons.mozilla.org/en-US/firefox/addon/temporary-containers/) <sup>✔ Privacy (stated on AMO)</sup> | [GitHub](https://github.com/stoically/temporary-containers)
    * This can achieve *almost* everything First Party Isolation (FPI) does without breaking cross-domain logins
-   * In an hardened setup, this can even isolate repeat visits to the same domain, which FPI alone cannot.
+   * In an hardened setup, this can even isolate repeat visits to the same domain, which FPI alone cannot
+   * Required reading: [1] [AMO description](https://addons.mozilla.org/firefox/addon/temporary-containers/) [2] [Article](https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21) [3] [TC's Wiki](https://github.com/stoically/temporary-containers/wiki)
 
 <sup>1</sup> Note: There are Web Extension API limitations, such as handling strict CSP and @run-at document-start. So TEST your scripts!