@-moz-document url("chrome://browser/content/browser.xul") {
:root {
    --v-column-count: 3;
    --v-column-count-child: 2;
    --v-column-width: 18em;
    --v-column-width-child: 18em;
    --v-column-gap: 1px;
    --v-column-rule: 1px solid rgb(60,60,61);
    --v-scrollbar-overflow-y: auto;  /* или hidden чтобы скрыть скроллбар */
}
/* **************************************************** */
#BMB_bookmarksPopup, #bookmarksMenuPopup {
    max-width: none !important;
    width: auto !important;
}
:-moz-any(#BMB_bookmarksPopup,#bookmarksMenuPopup) .arrowscrollbox-scrollbox  {
    max-width: none !important;
    width: auto !important;
    min-width: calc(var(--v-column-count) * (var(--v-column-width) + var(--v-column-gap)) + 80px) !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    overflow-y: var(--v-scrollbar-overflow-y) !important;
}
:-moz-any(#BMB_bookmarksPopup,#bookmarksMenuPopup) .arrowscrollbox-scrollbox > .scrollbox-innerbox {
    display: inline-block !important;
    column-count: var(--v-column-count) !important;
    column-width: var(--v-column-width) !important;
    column-rule: var(--v-column-rule) !important;
    column-gap: var(--v-column-gap) !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
}
:-moz-any(#BMB_bookmarksPopup,#bookmarksMenuPopup) .bookmark-item[container="true"] menupopup .arrowscrollbox-scrollbox {
    max-width: none !important;
    width: auto !important;
    min-width: calc(var(--v-column-count-child) * (var(--v-column-width-child) + var(--v-column-gap)) + 80px) !important;
}
:-moz-any(#BMB_bookmarksPopup,#bookmarksMenuPopup) .bookmark-item[container="true"] menupopup .arrowscrollbox-scrollbox > .scrollbox-innerbox {
    column-count: var(--v-column-count-child) !important;
    column-width: var(--v-column-width-child) !important;
}
:-moz-any(#BMB_bookmarksPopup,#bookmarksMenuPopup) :-moz-any(menu,menuitem,menuseparator) {
    width: -moz-available !important;
}
}

#TabsToolbar .tabbrowser-tab:not([selected="true"]) {
  background-color: red !important;
}

#TabsToolbar[brighttext] .tabbrowser-tab:not([selected="true"]) {
  background-color: darkred !important;
}

@font-face {
    font-family: "Bitstream Vera Serif Bold";
    src: url("./fonts/VeraSeBd.ttf");
}

#BMB_bookmarksPopup, #bookmarksMenuPopup {
    font-family: "Bitstream Vera Serif Bold" !important;
    font-size:  12px !important;
}

#BMB_bookmarksPopup .subviewbutton {
    min-height: 18px !important;
    padding-top: 1px !important;
    padding-bottom: 1px !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
}

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

@font-face {
    font-family: "Comfortaa Regular";
    src: url("./fonts/Comfortaa-Regular.ttf");
}

#BMB_bookmarksPopup, #bookmarksMenuPopup,
#BMB_bookmarksPopup menupopup, #bookmarksMenuPopup menupopup {
    font-family: "Comfortaa Regular" !important;
    font-size:  12px !important;
}

#BMB_bookmarksPopup .subviewbutton {
    min-height: 18px !important;
    padding-top: 1px !important;
    padding-bottom: 1px !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
}

}

@-moz-document url-prefix("chrome://browser/content/places/") {

@font-face {
    font-family: "Comfortaa Regular";
    src: url("./fonts/Comfortaa-Regular.ttf");
}

#bookmarksPanel {
    font-family: "Comfortaa Regular" !important;
    font-size:  12px !important;
}

}

#tabbrowser-tabs > hbox.tab-drop-indicator-box {
    -moz-binding: url("data:text/xml;charset=utf-8,<bindings xmlns='http://www.mozilla.org/xbl'><binding id='unread'><implementation><field name='_eventListeners'>[];</field><constructor><![CDATA[ this._addEventListener(this.parentNode, 'TabSelect', function(event) { var tab = event.target; if (tab.hasAttribute('notselectedsinceload') && !gBrowser._previewMode) tab.removeAttribute('notselectedsinceload'); }, false); var popup = document.querySelector('%23tabContextMenu'); var ctabread = { handleEvent() { var item = this.item = popup.insertBefore(document.createElement('menuitem'), (popup.querySelector('%23context_closeOtherTabs') || popup.firstChild).nextSibling); item.setAttribute('label', '%D0%97%D0%B0%D0%BA%D1%80%D1%8B%D1%82%D1%8C%20%D0%BF%D1%80%D0%BE%D1%87%D0%B8%D1%82%D0%B0%D0%BD%D0%BD%D1%8B%D0%B5%20%D0%B2%D0%BA%D0%BB%D0%B0%D0%B4%D0%BA%D0%B8'); item.setAttribute('oncommand', 'ctabread.closetabs();'); item.ctabread = this; this.itemdis(); this.handleEvent = () => { this.itemdis(); }; }, itemdis() { this.item.disabled = (this.tabs = gBrowser.visibleTabs.filter(t => !t.selected && !t.multiselected && !t.pinned && !t.hasAttribute('notselectedsinceload'))).length == 0; }, closetabs() { gBrowser.removeTabs(this.tabs); } }; this._addEventListener(popup, 'popupshowing', ctabread, false); ]]></constructor><destructor><![CDATA[ this._eventListeners.forEach((args) => args[0].removeEventListener(args[1], args[2], args[3])); ]]></destructor><method name='_addEventListener'><body><![CDATA[ arguments[0].addEventListener(arguments[1], arguments[2], arguments[3]); this._eventListeners.push(arguments); ]]></body></method></implementation></binding></bindings>#unread") !important;
}

#bookmarksPanel {
    font-size:  16px !important;
}

#TabsToolbar,
#titlebar,
#tabbrowser-tabs {
    --tab-min-height: 26px !important;
    --toolbarbutton-inner-padding: 3px !important;
}
@media (-moz-windows-compositor) {
    #main-window[sizemode="normal"] > #titlebar {
        -moz-appearance: none !important;
    }
}