diff --git a/files/en-us/mozilla/add-ons/webextensions/api/webrequest/filterresponsedata/index.md b/files/en-us/mozilla/add-ons/webextensions/api/webrequest/filterresponsedata/index.md
index 535bd0fef5f116a..1342077f1db8466 100644
--- a/files/en-us/mozilla/add-ons/webextensions/api/webrequest/filterresponsedata/index.md
+++ b/files/en-us/mozilla/add-ons/webextensions/api/webrequest/filterresponsedata/index.md
@@ -68,7 +68,7 @@ function listener(details) {
     let str = decoder.decode(event.data, { stream: true });
     // Just change any instance of Example in the HTTP response
     // to WebExtension Example.
-    str = str.replace(/Example/g, "WebExtension Example");
+    str = str.replaceAll("Example", "WebExtension Example");
     filter.write(encoder.encode(str));
     filter.disconnect();
   };