@-moz-document url("chrome://browser/content/browser.xhtml") {
*|*:root {
    --v-toolbar-menubar-height: 28px; /* высота панели меню, только чётные числа не меньше 20px,
    если изменяете эту переменную то и в --v-toolbar-menubar-height-content - атрибут height= нужно установить ровно в два раза больше*/
    --v-toolbar-menubar-height-content: url("data:image/svg+xml,<svg width='28' height='56' xmlns='http://www.w3.org/2000/svg'><rect x='0' y='0' width='100%' height='100%' style='fill:transparent;'/></svg>");  /* height='2 * --v-toolbar-menubar-height' */
    --tab-border-radius: 4px !important;
 
    /* **************************************** */
    --proton-tab-block-margin: 0px !important;
}
#navigator-toolbox {
    border-block: none !important;
    box-shadow: none !important;
    padding-top: 0 !important;
    -moz-appearance: none !important;
    appearance: none !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar] #navigator-toolbox {
    position: relative !important;
}
#navigator-toolbox > toolbar {
    -moz-box-ordinal-group: 10 !important;
}
#navigator-toolbox > #nav-bar {
    margin-block: 0 !important;
    box-shadow: none !important;
    -moz-box-ordinal-group: 0 !important;
    padding-inline: 0 !important;
}
*|*:root:not([inFullscreen]) #navigator-toolbox > #nav-bar {
    margin-top: var(--v-toolbar-menubar-height) !important;
}
#navigator-toolbox > #PersonalToolbar {
    -moz-box-ordinal-group: 1 !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar] > *|body::before {
    content: var(--v-toolbar-menubar-height-content) !important;
    display: -moz-box !important;
    -moz-box-flex: 0 !important;
    -moz-box-orient: vertical !important;
    -moz-box-pack: start !important;
    -moz-box-align: stretch !important;
    -moz-box-ordinal-group: 0 !important;
    margin-bottom: calc(-2 * var(--v-toolbar-menubar-height)) !important;
    box-sizing: content-box !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][sizemode="normal"] > *|body::before {
    -moz-appearance: -moz-window-titlebar !important;
    appearance: -moz-window-titlebar !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][sizemode="maximized"] > *|body::before {
    -moz-appearance: -moz-window-titlebar-maximized !important;
    appearance: -moz-window-titlebar-maximized !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar]:-moz-lwtheme > *|body::before {
    visibility: hidden !important;
}
#navigator-toolbox > #titlebar {
    -moz-appearance: none !important;
    appearance: none !important;
    -moz-box-ordinal-group: 100 !important;
    position: static !important;
}
#toolbar-menubar {
    padding-block: 0 !important;
    margin-block: 0 !important;
    border: none !important;
    background: none !important;
    --toolbarbutton-outer-padding: 0px !important;
    --toolbarbutton-inner-padding: calc((var(--v-toolbar-menubar-height) - 16px) / 2) !important;
    -moz-appearance: none !important;
    appearance: none !important;
}
*|*:root:not(:is([inFullscreen],[chromehidden~="menubar"])) #toolbar-menubar {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    display: flex !important;
    flex-wrap: nowrap !important;
    flex-direction: row !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    min-height: 0 !important;
    height: var(--v-toolbar-menubar-height) !important;
    overflow: hidden !important;
}
#toolbar-menubar *|*.toolbarbutton-badge {
    margin-inline-end: calc(-1 * (var(--toolbarbutton-outer-padding) + var(--toolbarbutton-inner-padding))) !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > :is(toolbaritem,toolbarbutton) {
    align-self: center !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > :is(#menubar-items,#wrapper-menubar-items,.titlebar-buttonbox-container) {
    align-self: flex-start !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > * {
    padding-block: 0 !important;
    margin-block: 0 !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar[autohide="true"][inactive="true"]:not([customizing="true"]) > *:not(.titlebar-buttonbox-container) {
    opacity: 0 !important;
    pointer-events: none !important;
}
*|*:root[inFullscreen] #toolbar-menubar {
    visibility: collapse !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > :is(*[style*="-moz-box-ordinal-group: 1000;"],.titlebar-buttonbox-container) {
    order: 1000 !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > :is(toolbarspring,spacer,[id^="wrapper-customizableui-special-spring"]) {
    flex-grow: 1 !important;
}
*|*:root:not([inFullscreen]) #toolbar-menubar > :is(#search-container,#wrapper-search-container) {
    flex-grow: 100 !important;
}
#toolbar-menubar #search-container {
    padding-block: 0 !important;
}
#toolbar-menubar #searchbar {
    min-height: calc(var(--v-toolbar-menubar-height) - 2px) !important;
}
#TabsToolbar {
    -moz-appearance: none !important;
    appearance: none !important;
    padding-block: 0 !important;
    margin-block: 0 !important;
    box-shadow: 0 -1px 0 var(--tabs-border-color, rgba(0,0,0,.3)) inset !important;
    position: static !important;
    background-color: var(--toolbar-bgcolor, -moz-dialog) !important;
    background-image: var(--toolbar-bgimage, none) !important;
    color: var(--toolbar-color, -moz-dialogtext) !important;
    --lwt-toolbarbutton-icon-fill: inherit !important;
}
#TabsToolbar #tabbrowser-tabs {
    padding-bottom: 0 !important;
    margin-bottom: 0 !important;
}
#TabsToolbar .tabbrowser-tab {
    background-color: transparent !important;
    border-top: none !important;
}
#TabsToolbar .tab-background {
    border-end-end-radius: 0 !important;
    border-end-start-radius: 0 !important;
}
#TabsToolbar > .toolbar-items {
    padding-top: 0 !important;
    margin-top: 0 !important;
}
#TabsToolbar .tab-background {
    border-top-style: solid !important;
}
#TabsToolbar .titlebar-buttonbox-container,
#navigator-toolbox::after,
#TabsToolbar::after,
#TabsToolbar .titlebar-spacer:is([type="pre-tabs"],[type="post-tabs"]) {
    display: none !important;
}
#scrollbutton-up, #scrollbutton-down {
    border-block: none !important;
    border-end-end-radius: 0 !important;
    border-end-start-radius: 0 !important;
}
*|*:root[inFullscreen] #window-controls {
    position: absolute !important;
    display: flex !important;
    align-items: start !important;
    top: 0 !important;
    left: auto !important;
    right: 0 !important;
    margin: 0 !important;
}
*|*:root[inFullscreen] #window-controls:-moz-locale-dir(rtl) {
    left: 0 !important;
    right: auto !important;
}
*|*:root[inFullscreen] #navigator-toolbox > #nav-bar {
    padding-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;
    padding-inline-end: var(--v-titlebar-buttonbox-container-width, 108px) !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;
}
@media (-moz-os-version: windows-win7), (-moz-os-version: windows-win8) {
*|*: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;
}
    }
}
@media (-moz-windows-classic) {
*|*:root:not([inFullscreen])[tabsintitlebar][sizemode="normal"] #navigator-toolbox::before {
    content: "" !important;
    display: -moz-box !important;
    height: 4px !important;
    -moz-box-ordinal-group: 0 !important;
    visibility: visible !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][sizemode="normal"]:-moz-lwtheme #navigator-toolbox::before {
    background-image: linear-gradient(to bottom, ThreeDLightShadow 0, ThreeDLightShadow 1px, ThreeDHighlight 1px, ThreeDHighlight 2px, ActiveBorder 2px, ActiveBorder 4px, transparent 4px) !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][sizemode="normal"] #toolbar-menubar {
    margin-top: 4px !important;
}
}
*|*:root[data-l10n-id="browser-main-window-mac"] {
    --v-toolbar-menubar-height: 0px !important;
    --v-toolbar-menubar-height-content: none !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][data-l10n-id="browser-main-window-mac"] #nav-bar {
    margin-inline-start: calc(var(--toolbarbutton-outer-padding, 2px) + var(--v-titlebar-button-horizont-padding, 6px) * 6 + var(--v-titlebar-button-image-width, 12px) * 3) !important;
}
*|*:root:not([inFullscreen])[tabsintitlebar][data-l10n-id="browser-main-window-mac"] #TabsToolbar .titlebar-buttonbox-container {
    visibility: visible !important;
    display: -moz-box !important;
    position: absolute !important;
    display: flex !important;
    top: 0 !important;
}
#urlbar-background, #searchbar {
    --toolbarbutton-border-radius: calc(var(--urlbar-height, 1000px) / 2) !important;
    border-radius: var(--toolbarbutton-border-radius) !important;
}
/* Ширина и цвет верхней границы текущей вкладки */
.tabbrowser-tab[selected] .tab-content {
  margin-bottom: 0px !important;
  border-top-style: solid !important;
  border-top-width: 3px !important;
  border-top-color: black  !important;
}

menupopup > menuitem,
menupopup > menu {
    padding-block: 4px !important;
    padding-inline-start: 8px !important;
}
.tabbrowser-tab > .tab-stack > .tab-background:not([selected="true"], [multiselected]) {
    background-color: color-mix(in srgb, currentColor 10%, transparent) !important;
}
.tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected="true"], [multiselected]) {
    background-color: color-mix(in srgb, currentColor 20%, transparent) !important;
}