Copy the visible table as TSV

(function () {
  try {
    var table = document.querySelector('table[class*="Polaris"], .Polaris-IndexTable table');
    if (!table) { alert('No table found on this page.'); return; }
    var lines = [];
    table.querySelectorAll('tr').forEach(function (tr) {
      var cells = tr.querySelectorAll('th, td');
      if (!cells.length) return;
      var row = [];
      cells.forEach(function (c) {
        row.push((c.innerText || c.textContent || '').replace(/\s+/g, ' ').trim());
      });
      lines.push(row.join('\t'));
    });
    if (!lines.length) { alert('Table has no rows.'); return; }
    var tsv = lines.join('\n');
    if (navigator.clipboard && navigator.clipboard.writeText) {
      navigator.clipboard.writeText(tsv).then(function () {
        alert('Copied ' + lines.length + ' rows as TSV.');
      });
    } else {
      var ta = document.createElement('textarea');
      ta.value = tsv; document.body.appendChild(ta); ta.select();
      document.execCommand('copy'); ta.remove();
      alert('Copied ' + lines.length + ' rows as TSV.');
    }
  } catch (e) { alert('Could not copy table: ' + e.message); }
})();