Every link I click on is opening in a new window, and everytime I start typing a letter into the navigation toolbar, it shows up as a capital even though caps l

Out of the blue, just a few minutes ago, every time I click on a link, it opens in a new window. It is very frustrating and annoying, and I don't know why this is happening. Also, when I start to type in the navigation bar, the first letter shows up as a capital even though caps lock is not on. I think the problems are related, but I don't know how.