Enabling widget.windows.mica in about:config breaks hide_tabs_toolbar_v2.css

[Hikandy]

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The windows maximize, minimize and close buttons disappear on using this CSS resulting in

The buttons still work but they are invisible. Using Firefox 133

[MrOtherGuy]

I have no idea what that might be all about, especially if they do work. I also won't be able to test anything on Win11 so that might be kinda hard for me to fix.

[MrOtherGuy]

What happens if you added this:

@media (-moz-windows-mica) {
  .titlebar-buttonbox{ opacity: 0 }
}

[MrOtherGuy]

No, actually, what even happens if you don't have any custom css, and just enable vertical tabs (set sidebar.revamp and sidebar.verticalTabs to true in about config)?