With each update, Facebook has gotten incrementally more cluttered, perplexing, and ornery—and I'm not even talking about all your annoying acquaintances flooding it with inane status updates. Yet, at the same time, it's become a tool few of us can live without. If Facebook has you on your last nerve, here's how to fix some of its biggest annoyances in a matter of minutes—and with only one new addition to your browser.