Toolbars in fullscreen view, show above the page and not move the page
In firefox fullscreen, movign the mouse to the top edge, shows the toolbars. I really like this feature, BUT when the toolbars show they push the whole page down, giving a very jarring effect as the whole page jumps down.
Is it possible that the whole doesn't jump when the toolbars show ? The toolbar could just cover the top of the page and go back into hiding as they do.
Would an extension be able to fix this ?
Firefox: all recent versions.
No, that's the way that Fullscreen mode works. Hasn't been an extension to changed that "pushing the content down abruptly" for many years.
See my full answer to you over here: http://forums.mozillazine.org/viewtopic.php?p=14824203#p14824203