1 files changed, 1 insertions, 1 deletions
diff --git a/browser/extensions/pictureinpicture/video-wrappers/arte.js b/browser/extensions/pictureinpicture/video-wrappers/arte.js
index 3d1df1f65f..c8bbec2855 100644
--- a/browser/extensions/pictureinpicture/video-wrappers/arte.js
+++ b/browser/extensions/pictureinpicture/video-wrappers/arte.js
@@ -10,7 +10,7 @@ class PictureInPictureVideoWrapper {
 
     if (container) {
       updateCaptionsFunction("");
-      const callback = function (mutationsList, observer) {
+      const callback = function () {
         let textNodeList = container.querySelectorAll(".avp-captions-line");
         if (!textNodeList.length) {
           updateCaptionsFunction("");