1 files changed, 1 insertions, 1 deletions
diff --git a/browser/components/customizableui/test/browser_1087303_button_fullscreen.js b/browser/components/customizableui/test/browser_1087303_button_fullscreen.js
index f67e81b892..42f9b58370 100644
--- a/browser/components/customizableui/test/browser_1087303_button_fullscreen.js
+++ b/browser/components/customizableui/test/browser_1087303_button_fullscreen.js
@@ -44,7 +44,7 @@ function promiseFullscreenChange() {
       reject("Fullscreen change did not happen within " + 20000 + "ms");
     }, 20000);
 
-    function onFullscreenChange(event) {
+    function onFullscreenChange() {
       clearTimeout(timeoutId);
       window.removeEventListener("fullscreen", onFullscreenChange, true);
       info("Fullscreen event received");