diff --git a/public/content-script.js b/public/content-script.js
index fccfb26..912e172 100644
--- a/public/content-script.js
+++ b/public/content-script.js
@@ -117,9 +117,11 @@ function injectors(msgSource) {
         };
 
         removeListener(eventType, callback) {
+          this.stream.removeListener(eventType, callback);
         }
 
         cancel() {
+          this.stream.cancel();
         }
       }