diff --git a/user.js b/user.js
index b4835a6..4460c81 100644
--- a/user.js
+++ b/user.js
@@ -903,12 +903,12 @@ user_pref("javascript.options.baselinejit", false);
  * [NOTE] In FF71+ this no longer affects extensions (1576254)
  * [1] https://developer.mozilla.org/docs/WebAssembly ***/
 user_pref("javascript.options.wasm", false);
-/* 2426: disable Intersection Observer API [FF55+]
- * [NOTE] Unlike arkenfox/user.js, we explicitly disable it
+/* 2426: disable Intersection Observer API [FF55+] [RESTART]
+ * [NOTE] Disabling it may break the error console (CTRL+SHIFT+J)
  * [1] https://developer.mozilla.org/docs/Web/API/Intersection_Observer_API
  * [2] https://w3c.github.io/IntersectionObserver/
  * [3] https://bugzilla.mozilla.org/1243846 ***/
-user_pref("dom.IntersectionObserver.enabled", false);
+   // user_pref("dom.IntersectionObserver.enabled", false);
 /* 2429: enable (limited but sufficient) window.opener protection [FF65+]
  * Makes rel=noopener implicit for target=_blank in anchor and area elements when no rel attribute is set ***/
 user_pref("dom.targetBlankNoOpener.enabled", true); // [DEFAULT: true FF78+]