The invention of the browser tab radically changed the way I browse the Internet, mostly for the better. I now often have two or two browser windows open with upwards of 25 sites open.
One of the downsides of having multiple windows with multiple tabs open is that sometimes one of those sites starting playing music/sound and you have no idea which one is responsilble.
Chrome, my browser of choice, has recently added a little speaker icon to any tab that is currently playing audio. This makes me so happy that I should probably take a good look at my life. A small, small feature which has made my browsing much, much better.
Thanks, Google. You're still kinda creepy, but your Chrome team is doing good work!