diff --git a/web/app.js b/web/app.js
index 78aacbc98357f..8261040c0de87 100644
--- a/web/app.js
+++ b/web/app.js
@@ -2571,14 +2571,23 @@ function webViewerKeyDown(evt) {
     }
   }
 
-  if (typeof PDFJSDev === "undefined" || !PDFJSDev.test("MOZCENTRAL")) {
+  if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC || CHROME")) {
+    const { eventBus } = PDFViewerApplication;
+
     // CTRL or META without shift
     if (cmd === 1 || cmd === 8) {
       switch (evt.keyCode) {
         case 83: // s
-          PDFViewerApplication.download();
+          eventBus.dispatch("download", { source: window });
           handled = true;
           break;
+
+        case 79: // o
+          if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
+            eventBus.dispatch("openfile", { source: window });
+            handled = true;
+          }
+          break;
       }
     }
   }