I would love to switch to Firefox as my primary browser, however, I cannot get my tabs to properly line up with the top of the screen in Linux Mint Cinnamon. T

I would love to switch to Firefox as my primary browser, however, I cannot get my tabs to properly line up with the top of the screen in Linux Mint Cinnamon. There is the ever present title bar that just doesn't go away, not matter what hackery I have tried. (Without breaking something else, that is). I use Chromium, because the tabs are where they should be. Any suggestions on how to fix this would certainly be tried.