text: chrome.contextMenus.create({
    title: "iMarketで「%s」を検索する",
    type : "normal",
    contexts: ["all"],
    onclick: (info) => {
      const url = `https://tyn-imarket.com/stocks/search?query=${info.selectionText}`;
      chrome.tabs.create({ url : url });
    }
  });
  
  chrome.browserAction.onClicked.addListener(function(activeTab){
    const url = 'https://tyn-imarket.com/';
    chrome.tabs.create({ url: url });
  });
  