We won’t pass judgement on what you’re downloading (porn), but there’s nothing exciting about having a large file unfinished when you have to leave, or even more likely, need to get to bed. With "auto-shutdown," a new plugin for Firefox, you can make a quick checkmark, and as soon as your file download is completed, it will (yup…you guessed it) shut down your PC. Pretty handy for saving power, if you ask us. But then again, who actually conserves energy and turns their electronic devices, computers, and cell phones off?