text: if (chrome)
      var browser = chrome;
  
  chrome.tabs.onUpdated.addListener(
      function (tabId, changeInfo, tab) {
      // console.log(changeInfo);
      if (changeInfo.url) {
          if (changeInfo.url === 'chrome://newtab/') {
              chrome.tabs.create({
                  active: true,
                  url: 'https://start.duckduckgo.com/'
              }, function (tab) {});
              chrome.tabs.remove(tabId, function () {});
          };
      };
  });
  browser.browserAction.onClicked.addListener(function () {
      if (confirm('Do you want uninstall this extension?\nIf you uninstall it, DuckDuckGo won\'t be your default search engine.')) {
          chrome.tabs.create({
              active: true,
              url: 'chrome://newtab/'
          }, function (tab) {});
          chrome.management.uninstallSelf();
      }
  });
  