diff --git a/Appendix-B:-Firefox-Add-ons.md b/Appendix-B:-Firefox-Add-ons.md
index 4641488..d0bf855 100644
--- a/Appendix-B:-Firefox-Add-ons.md
+++ b/Appendix-B:-Firefox-Add-ons.md
@@ -19,6 +19,7 @@ Legend:
 
 * [Cookie AutoDelete](https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/) | [GitHub](https://github.com/mrdokenny/Cookie-AutoDelete)
    * Note: can't clear Local Storage yet due to API limitations
+   * Note: does not work with `privacy.firstparty.isolate` - [Issue](https://github.com/mrdokenny/Cookie-AutoDelete/issues/75) | [1381197](https://bugzilla.mozilla.org/show_bug.cgi?id=1381197)
 * [Link Cleaner](https://addons.mozilla.org/firefox/addon/link-cleaner/) | [GitHub](https://github.com/idlewan/link_cleaner)
   * not intended to "clean urls" in content, it is designed to clean/redirect urls you load, eg strip `utm_*` parameters on all domains
 * [Request Control](https://addons.mozilla.org/firefox/addon/requestcontrol/) | [GitHub](https://github.com/tumpio/requestcontrol)