diff --git a/web/pdf_scripting_manager.js b/web/pdf_scripting_manager.js
index 976bc610a..234b4398d 100644
--- a/web/pdf_scripting_manager.js
+++ b/web/pdf_scripting_manager.js
@@ -261,6 +261,11 @@ class PDFScriptingManager {
    * @private
    */
   async _updateFromSandbox(detail) {
+    // Ignore some events, see below, that don't make sense in PresentationMode.
+    const isInPresentationMode =
+      this._pdfViewer.isInPresentationMode ||
+      this._pdfViewer.isChangingPresentationMode;
+
     const { id, command, value } = detail;
     if (!id) {
       switch (command) {
@@ -284,12 +289,21 @@ class PDFScriptingManager {
           console.log(value);
           break;
         case "zoom":
+          if (isInPresentationMode) {
+            return;
+          }
           this._pdfViewer.currentScaleValue = value;
           break;
       }
       return;
     }
 
+    if (isInPresentationMode) {
+      if (detail.focus) {
+        return;
+      }
+    }
+
     const element = document.getElementById(id);
     if (element) {
       element.dispatchEvent(new CustomEvent("updatefromsandbox", { detail }));
@@ -382,11 +396,9 @@ class PDFScriptingManager {
    * @private
    */
   async _getDocProperties() {
-    // The default viewer use-case.
     if (this._docPropertiesLookup) {
       return this._docPropertiesLookup(this._pdfDocument);
     }
-    // Fallback, to support the viewer components use-case.
     if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("COMPONENTS")) {
       const { docPropertiesLookup } = require("./generic_scripting.js");