--- a/toolkit/components/extensions/ExtensionCommon.jsm
+++ b/toolkit/components/extensions/ExtensionCommon.jsm
@@ -1262,17 +1262,33 @@ class SchemaAPIManager extends EventEmit
    * @returns {object} A sandbox that is used as the global by `loadScript`.
    */
   _createExtGlobal() {
     let global = Cu.Sandbox(Services.scriptSecurityManager.getSystemPrincipal(), {
       wantXrays: false,
       sandboxName: `Namespace of ext-*.js scripts for ${this.processType} (from: resource://gre/modules/ExtensionCommon.jsm)`,
     });
 
-    Object.assign(global, {global, Cc, Ci, Cu, Cr, XPCOMUtils, ChromeUtils, ChromeWorker, ExtensionAPI, ExtensionCommon, MatchPattern, MatchPatternSet, MatchGlob, StructuredCloneHolder, extensions: this});
+    Object.assign(global, {
+      Cc,
+      ChromeUtils,
+      ChromeWorker,
+      Ci,
+      Cr,
+      Cu,
+      ExtensionAPI,
+      ExtensionCommon,
+      MatchGlob,
+      MatchPattern,
+      MatchPatternSet,
+      StructuredCloneHolder,
+      XPCOMUtils,
+      extensions: this,
+      global,
+    });
 
     Cu.import("resource://gre/modules/AppConstants.jsm", global);
 
     XPCOMUtils.defineLazyGetter(global, "console", getConsole);
 
     XPCOMUtils.defineLazyModuleGetters(global, {
       ExtensionUtils: "resource://gre/modules/ExtensionUtils.jsm",
       XPCOMUtils: "resource://gre/modules/XPCOMUtils.jsm",