diff --git a/chrome/content/zotero/debugViewer.js b/chrome/content/zotero/debugViewer.js
index d83be71c09..98634486fe 100644
--- a/chrome/content/zotero/debugViewer.js
+++ b/chrome/content/zotero/debugViewer.js
@@ -79,10 +79,11 @@ function scrollToPageBottom() {
 }
 
 function submit(button) {
+	const { ZOTERO_CONFIG } = ChromeUtils.importESModule('resource://zotero/config.mjs');
+	
 	button.setAttribute('disabled', '');
 	clearSubmitStatus();
 	
-	Cu.import("resource://zotero/config.js");
 	var url = ZOTERO_CONFIG.REPOSITORY_URL + "report?debug=1";
 	var output = document.getElementById('errors').textContent
 		+ "\n\n" + "=========================================================\n\n"
diff --git a/chrome/content/zotero/standalone/standalone.js b/chrome/content/zotero/standalone/standalone.js
index a5741467a1..15ee435cb7 100644
--- a/chrome/content/zotero/standalone/standalone.js
+++ b/chrome/content/zotero/standalone/standalone.js
@@ -28,6 +28,8 @@
  * This object contains the various functions for the interface
  */
 const ZoteroStandalone = new function () {
+	const { ZOTERO_CONFIG } = ChromeUtils.importESModule('resource://zotero/config.mjs');
+
 	const FONT_SIZES = [
 		"0.77", // 10
 		"0.85", // 11
@@ -740,8 +742,6 @@ const ZoteroStandalone = new function () {
 	 * Handles help menu requests
 	 */
 	this.openHelp = function (type) {
-		Cu.import("resource://zotero/config.js");
-		
 		switch (type) {
 		case "troubleshooting":
 			ZoteroPane.loadURI(ZOTERO_CONFIG.TROUBLESHOOTING_URL);
@@ -821,8 +821,6 @@ ZoteroStandalone.DebugOutput = {
 		return Zotero.Promise.coroutine(function* () {
 			Zotero.debug("Submitting debug output");
 			
-			Cu.import("resource://zotero/config.js");
-			
 			var url = ZOTERO_CONFIG.REPOSITORY_URL + "report?debug=1";
 			var output = yield Zotero.Debug.get(
 				Zotero.Prefs.get('debug.store.submitSize'),