Tip: Turn off Firefox 89-90 "Proton" Design

[Kresimir]

@Hystrix

I presume you disabled Title Bar too .

Yeah, not only on Firefox. The titlebar is the most useless part of the GUI ever.

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EDIT: I do this:

[Tip] Hide Titlebars on Maximised Windows in KDE Plasma

Titlebars are a total waste of space, especially on maximised windows. Here is, in my opinion, the best way to get rid of them. Hiding window borders (including titlebars) is easily done on Plasma on a per-window basis using the Window Operations Menu, default shortcut: Alt+F3, or on a per-application basis, by setting Window Rules. But that is quite slow and cumbersome, as you would have to do it manually for every window. Not good. You can also set a keyboard shortcut to hide and show window …