One of my favorite Firefox add-ons is adblock plus. That add-on filters out all of the ads on the pages as they load, so they load faster and I don't have to see all the ads for get rich quick schemes, hemorrhoids relief, or the next miracle drug. Even on Facebook I don't have to see all the ads on the side of the page. The last time we reformatted our computer I'd forgotten about it and was surprised when I was suddenly seeing ads again. Good thing it is easy to get back.