ok, so ever since I downloaded the newer version of Firefox my tabs icon (+) on the top is gone. I know I can hit cntrl T, but I really like just clicking the + which opens a new tab. How do I get that back?? I've looked around the HELP section and can only find info about what tabs are etc... Even in all the picutres about the feature it shows the + icon at the top of the page to open a new one. What do I do??