@-moz-document url("chrome://browser/content/browser.xhtml") {

/* FIX aris-t2 tabs_below_navigation_toolbar_alt.css */
#main-window[tabsintitlebar][sizemode="maximized"] * #titlebar, #main-window[tabsintitlebar][sizemode="maximized"] #navigator-toolbox #TabsToolbar, #main-window[uidensity=compact][tabsintitlebar][sizemode="maximized"] #navigator-toolbox #TabsToolbar,
#main-window[tabsintitlebar][sizemode="maximized"] #navigator-toolbox #toolbar-menubar[autohide="true"][inactive="true"] ~ #TabsToolbar, #main-window[uidensity=compact][tabsintitlebar][sizemode="maximized"] #navigator-toolbox #toolbar-menubar[autohide="true"][inactive="true"] ~ #TabsToolbar { margin-top: 0px !important;}

:root:not([inFullscreen])[v_menubar_autohide="true"] #navigator-toolbox > #nav-bar {
    margin-top: 0 !important;
}
:root:not([inFullscreen])[v_menubar_autohide="true"] #toolbar-menubar {
    pointer-events: none !important;
}
:root:not([inFullscreen])[v_menubar_autohide="true"] #toolbar-menubar .titlebar-buttonbox-container {
    pointer-events: auto !important;
}
:root[inFullscreen] #navigator-toolbox > #nav-bar {
    margin-inline-end: var(--v-titlebar-buttonbox-container-width, 108px) !important;
}
:root:not([inFullscreen])[v_menubar_autohide="true"] #navigator-toolbox > #nav-bar {
    margin-top: 0 !important;
    margin-inline-end: var(--v-titlebar-buttonbox-container-width, 108px) !important;
}
@media (-moz-platform: windows-win10), (-moz-platform: windows-win8), (-moz-platform: windows-win7), (-moz-os-version:windows-win10), (-moz-os-version:windows-win8), (-moz-os-version:windows-win7) {
:root[sizemode="normal"] #TabsToolbar {
    border-inline: 1px solid hsla(240,5%,5%,0.3) !important;
    background-clip: padding-box !important;
}
    @media (-moz-windows-classic: 0) {
:root:not([inFullscreen])[v_menubar_autohide="true"][tabsintitlebar][sizemode="normal"] #navigator-toolbox > #nav-bar {
    margin-top: 1px !important;
}
:root:not([inFullscreen])[sizemode="normal"] #toolbar-menubar:not([autohide="true"]) > #menubar-items {
    margin-top: 1px !important;
}
    }
}

}

var menubarvisibilitychance = {
	buttons: null,
	buttonsfullscreen: null,
	init(that) {
		var menubar = this.menubar = document.querySelector("#toolbar-menubar");
		if (!menubar) return;
		this.autohidechange = new MutationObserver(() => {
			this.settoolbarvisibility();
		});
		this.autohidechange.observe(menubar, {
			attributeFilter: ["autohide", "inactive"],
			attributes: true,
		});
		this.sizemodechange = new MutationObserver(() => {
			this.setbuttonboxwidth();
		});
		this.sizemodechange.observe(document.documentElement, {
			attributeFilter: ["sizemode"],
			attributes: true,
		});
		that.unloadlisteners?.push("menubarvisibilitychance");
		this.settoolbarvisibility();
	},
	settoolbarvisibility() {
		var docElm = document.documentElement;
		if (this.menubar.getAttribute("autohide") == "true" && this.menubar.getAttribute("inactive") == "true") {
			docElm.setAttribute("v_menubar_autohide", true);
			this.setbuttonboxwidth();
		} else
			docElm.setAttribute("v_menubar_autohide", false);
	},
	width(outerRect, innerRect) {
		if (!window.RTL_UI)
			this.width = (outerRect, innerRect) => outerRect.right - innerRect.left;
		else
			this.width = (outerRect, innerRect) => innerRect.right - outerRect.left;
		return this.width(outerRect, innerRect);
	},
	setbuttonboxwidth() {
		var buttons, docElm = document.documentElement;
		if (docElm.getAttribute("sizemode") != "fullscreen")
			buttons = (this.buttons || (this.buttons = this.menubar.querySelector(".titlebar-buttonbox-container")));
		else
			buttons = (this.buttonsfullscreen || (this.buttonsfullscreen = document.querySelector("#window-controls")));
		var innerRect = buttons.getBoundingClientRect();
		if (innerRect.width < 1) {
			docElm.style.setProperty("--v-titlebar-buttonbox-container-width", "0px");
			return;
		}
		var outerRect = docElm.getBoundingClientRect();
		docElm.style.setProperty("--v-titlebar-buttonbox-container-width", `${this.width(outerRect, innerRect)}px`);
	},
	destructor() {
		this.autohidechange.disconnect();
		this.sizemodechange.disconnect();
		this.autohidechange = null;
		this.sizemodechange = null;
	}
};
menubarvisibilitychance.init(this);

:root[privatebrowsingmode="temporary"] #tabbrowser-tabs {
    background-color: цвет;
}