mozrepl function to select the next tab with title matching a regex

next_tab.js

// mozrepl function to select the next tab with title matching a regex

function next_tab(title_re) {
  var tabContainer = window.getBrowser().tabContainer;
  var tabs = tabContainer.childNodes;
  var numTabs = tabs.length;
  var startIndex = tabContainer.selectedIndex;
  var testIndex;

  for (i = 0; i < numTabs - 1; i++) {
    testIndex = (startIndex + i + 1) % numTabs;
    if (tabs[testIndex].label.match(title_re)) {
      tabContainer.selectedItem = tabs[testIndex];
      break;
    }
  }
}

next_tab(/Google Reader/)
repl.quit()

// cat next_tab.js | nc localhost 4242