Today Firefox suddenly started opening everything in new windows instead of new tabs, no matter what I clicked on or what site I was on, and I haven't messed with any settings before that. I even specifically right click and choose "open in new tab", and it doesn't work. I checked my settings, and "open new windows in new tabs" is still selected, so it's not that. Even when I went to the "Help" menu in Firefox it opened in a new window instead of a new tab. I don't know what the heck is going on, but I don't need 20 different Firefox windows open, and I don't see anything in the options that will fix this.