message: hot reload as extension popup
diff: @@ -22,10 +22,10 @@ let panelId = undefined;
  function openPage() {
  const getContentWindowInfo = browser.windows.getLastFocused();
  const getSideexWindowInfo = browser.windows.create({
  - url: browser.extension.getURL("assets/panel.html"),
  + url: browser.extension.getURL("assets/index.html"),
  type: "popup",
  height: 730,
  - width: 750
  + width: 480
  });
  Promise.all([getContentWindowInfo, getSideexWindowInfo])
  