diff --git a/4.1-Extensions.md b/4.1-Extensions.md
index c369c80..6d6bb07 100644
--- a/4.1-Extensions.md
+++ b/4.1-Extensions.md
@@ -30,7 +30,7 @@ These are all, where applicable, best configured to `deny-all` and whitelist.
 * [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)
-   * :exclamation: APIs do not exist to allow clearing IndexedDB, Service Workers cache, appCache, or cache by host. Clearing cookies & localStorage on their own, and leaving orphaned persistent data is a false sense of privacy
+   * :exclamation: APIs do not exist to allow clearing IndexedDB, Service Workers cache, appCache, or cache by host. Clearing cookies & localStorage on their own, and leaving orphaned persistent data is a false sense of privacy. Check [here](https://github.com/Cookie-AutoDelete/Cookie-AutoDelete/wiki/FAQ:-Common-Questions-and-Issues#what-is-the-state-of-the-webextension-api-to-clean-x-data)
 * [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. And (with or without FPI), in a hardened TC 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)