diff --git a/user.js b/user.js
index 85b59f4..2372a19 100644
--- a/user.js
+++ b/user.js
@@ -735,9 +735,11 @@ user_pref("security.mixed_content.block_display_content", true);
 user_pref("security.mixed_content.block_object_subrequest", true);
 /* 1244: enable HTTPS-Only mode [FF76+]
  * When "https_only_mode" (all windows) is true, "https_only_mode_pbm" (private windows only) is ignored
+ * [WARNING] This is experimental, see [1] and you can't set exceptions if FPI is enabled, see [2]
  * [SETTING] to add site exceptions: Page Info>Permissions>Use insecure HTTP (FF80+)
  * [SETTING] Privacy & Security>HTTPS-Only Mode (FF80+ with browser.preferences.exposeHTTPSOnly = true)
- * [1] https://bugzilla.mozilla.org/1613063 ***/
+ * [1] https://bugzilla.mozilla.org/1613063 [META]
+ * [2] https://bugzilla.mozilla.org/1647829 ***/
    // user_pref("dom.security.https_only_mode", true); // [FF76+]
    // user_pref("dom.security.https_only_mode_pbm", true); // [FF80+]
    // user_pref("dom.security.https_only_mode.upgrade_local", true); // [FF77+]