Discussion, talk and tips
https://forum.puppylinux.com/
I'm using a laptop with a very small screen and all the real estate I can get is much appreciated, so the huge titlebar is kind of a huge pain and I'd love to hide it, is there any possible way to do this?
In a browser you can press F11 key to go fullscreen. To return, press F11 again.
Hope, this helps.
If you prefer to click, then the "Toggle Fullscreen" extension may be for you.
https://addons.mozilla.org/en-US/firefo ... ent=search
Unfortunately, the 'Hide title bar' in the Firefox right-click 'Customize' menu, while present, doesn't actually DO anything under Linux.....unlike in Windows (where it does). This is probably related to the fact that there is no such thing as a single, 'standard' window manager in Linux; in Windows, everybody is 'singing from the same hymn-sheet', as it were.....so it's a lot simpler for Mozilla to code for this functionality.
It's exactly the same reason as why to achieve hardware acceleration in Linux Chrome, you have to jump through all sorts of additional hoops to get there. (Google candidly admit that is the very reason why they won't support hardware acceleration under Linux, because there's simply too many variables in play).
Welcome to the world of Linux software! 
Mike. 
Though I agree that fullscreen is the better option for small screens, it is also possible to hide only the title bar:
https://oldforum.puppylinux.com/viewtopic.php?p=997270