Actually set browser localstorage correctly

assets/js/background.js

@@ -32,7 +32,7 @@ document.getElementById("grabbutton").addEventListener("click", function () {
                     console.log(tr);
 
                 });
-                browser.storage.local.set(responsedata);
+                browser.storage.local.set({ pizmetdata: response });
             });
     });
 })