diff --git a/web/app.js b/web/app.js
index 69a155a64..1435a4687 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1423,7 +1423,10 @@ const PDFViewerApplication = {
       pdfViewer.optionalContentConfigPromise.then(optionalContentConfig => {
         this.pdfLayerViewer.render({ optionalContentConfig, pdfDocument });
       });
-      if ("requestIdleCallback" in window) {
+      if (
+        (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")) ||
+        "requestIdleCallback" in window
+      ) {
         const callback = window.requestIdleCallback(
           () => {
             this._collectTelemetry(pdfDocument);