I find myself usually having many youtube tabs open and counting the total time I'd need to watch all the videos. No more! Here's a handy little add-on that sums the videos total times for you.<p>Open source @ <a href="https://github.com/tmartty/YouTube-Open-Tabs-Total-Time" rel="nofollow">https://github.com/tmartty/YouTube-Open-Tabs-Total-Time</a>