chrome.action.onClicked.addListener((tab, event) => {
  chrome.windows.getCurrent((window) => {
    chrome.windows.create({
      url: "popup.html",
      type: "popup",
      width: 250,
      height: 84,
      top: window.top + (window.height - 84) / 2,
      left: window.left + (window.width - 250) / 2,
    });
  });
});