NOTE: Support of Dreditor has been nominal for a while. It's still the preferred tool for enhancing Drupal's issue queue, but keeping track of what the "official" version is can be tricky. For now, we recommend https://dreditor.github.io/. There's also been work happening to incorporate many of Dreditor's features right into Drupal.org itself. See https://www.drupal.org/project/drupalorg/issues/1673278
Dreditor is a great community tool that assists with things like patch reviews, and generally interacting with the Drupal.org issue queue. Dreditor is not a Drupal module, but is a plugin script you use in your browser. In this lesson, Joe walks through how to get Dreditor installed (on Chrome and Firefox), and then shows you how to use it to make your work in the issue queues more efficient.