Good question, I just did some testing in a Word document, and it did do it there as well, after I had typed 3 lines. I use Firefox.
As for downloads, the only recent downloads I can think of are for World of Warcraft add-ons, I use a Curse client, and download updates regularly for the game add-ons. As my daughter recently moved back home, (and I do wonder if she's done something!) there has been increased traffic to Myspace (blech) and Facebook, etc.