function openLnHt () {
  window.open(`https://ln.ht/_/add?url=${encodeURIComponent(document.location)}&title=${encodeURIComponent(document.title)}&notes=${document.querySelector('meta[name="description"]') !== null ? document.querySelector('meta[name="description"]').content : ''}&tags=${document.querySelector('meta[name="keywords"]') !== null ? document.querySelector('meta[name="keywords"]').content : ''}`);
}

chrome.action.onClicked.addListener((tab) => {
  if (!tab.url.includes('chrome://')) {
    chrome.scripting.executeScript({
      target: { tabId: tab.id },
      function: openLnHt
    });
  }
});