diff --git a/chrome/content/zotero/EPUB.mjs b/chrome/content/zotero/EPUB.mjs
index 631cc348bc..31ba38a34b 100644
--- a/chrome/content/zotero/EPUB.mjs
+++ b/chrome/content/zotero/EPUB.mjs
@@ -23,7 +23,7 @@
     ***** END LICENSE BLOCK *****
 */
 
-ChromeUtils.defineESModuleGetters(this, {
+ChromeUtils.defineESModuleGetters(globalThis, {
 	Zotero: "chrome://zotero/content/zotero.mjs",
 });
 
diff --git a/chrome/content/zotero/actors/ExternalLinkHandlerParent.mjs b/chrome/content/zotero/actors/ExternalLinkHandlerParent.mjs
index 394d495065..be88e19ee0 100644
--- a/chrome/content/zotero/actors/ExternalLinkHandlerParent.mjs
+++ b/chrome/content/zotero/actors/ExternalLinkHandlerParent.mjs
@@ -1,4 +1,4 @@
-ChromeUtils.defineESModuleGetters(this, {
+ChromeUtils.defineESModuleGetters(globalThis, {
 	Zotero: "chrome://zotero/content/zotero.mjs"
 });
 
diff --git a/chrome/content/zotero/actors/FeedAbstractParent.mjs b/chrome/content/zotero/actors/FeedAbstractParent.mjs
index c6470371e6..a7411cd05b 100644
--- a/chrome/content/zotero/actors/FeedAbstractParent.mjs
+++ b/chrome/content/zotero/actors/FeedAbstractParent.mjs
@@ -1,4 +1,4 @@
-ChromeUtils.defineESModuleGetters(this, {
+ChromeUtils.defineESModuleGetters(globalThis, {
 	Zotero: "chrome://zotero/content/zotero.mjs"
 });
 
diff --git a/chrome/content/zotero/actors/MendeleyAuthParent.mjs b/chrome/content/zotero/actors/MendeleyAuthParent.mjs
index 8bc57b41e3..7baeda67bf 100644
--- a/chrome/content/zotero/actors/MendeleyAuthParent.mjs
+++ b/chrome/content/zotero/actors/MendeleyAuthParent.mjs
@@ -1,6 +1,6 @@
 /* global JSWindowActorParent:false */
 
-ChromeUtils.defineESModuleGetters(this, {
+ChromeUtils.defineESModuleGetters(globalThis, {
 	Zotero: "chrome://zotero/content/zotero.mjs"
 });  
 
diff --git a/chrome/content/zotero/actors/ZoteroPrintParent.mjs b/chrome/content/zotero/actors/ZoteroPrintParent.mjs
index 7ca43b774d..baace42a10 100644
--- a/chrome/content/zotero/actors/ZoteroPrintParent.mjs
+++ b/chrome/content/zotero/actors/ZoteroPrintParent.mjs
@@ -1,9 +1,4 @@
-import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
-
-XPCOMUtils.defineLazyModuleGetters(this, {
-});
-
-ChromeUtils.defineESModuleGetters(this, {
+ChromeUtils.defineESModuleGetters(globalThis, {
 	Zotero: "chrome://zotero/content/zotero.mjs",
 });