@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
#urlbar:not(.megabar) > #urlbar-input-container > .urlbar-history-dropmarker,
#urlbar > .urlbar-history-dropmarker {
    -moz-binding: url("data:text/xml;charset=utf-8,<bindings xmlns='http://www.mozilla.org/xbl'><binding id='openPanel'><implementation><constructor><![CDATA[ var { UrlbarView } = ChromeUtils.import('resource:///modules/UrlbarView.jsm'); if ('orig_openPanel' in UrlbarView.prototype) return; var sandbox = Cu.Sandbox(Cu.getObjectPrincipal(UrlbarView.prototype), {}); sandbox.UrlbarView = UrlbarView; Cu.evalInSandbox(` Object.defineProperty(UrlbarView.prototype, 'orig_openPanel', { value: UrlbarView.prototype._openPanel, enumerable: false }); var openPanel = { _openPanel() { this.orig_openPanel.apply(this, arguments); let inputRect = this.input.textbox.getBoundingClientRect(); let px = number => number.toFixed(2) + 'px'; this.panel.style.setProperty('--v-panel-left', px(inputRect.left)); this.panel.style.setProperty('--v-panel-right', px(inputRect.right)); this.panel.style.setProperty('--v-panel-width', px(inputRect.right - inputRect.left)); } }; Object.defineProperty(UrlbarView.prototype, '_openPanel', { value: openPanel._openPanel, enumerable: false }); `, sandbox); ]]></constructor></implementation></binding></bindings>#openPanel") !important;
}
#urlbar:not(.megabar) > .urlbarView,
#urlbar-results {
    left: var(--v-panel-left, 0) !important;
    right: var(--v-panel-right, 0) !important;
    min-width: var(--v-panel-width, 100%) !important;
    max-width: var(--v-panel-width, 100%) !important;
}
#urlbar:not(.megabar) *|*.urlbarView-body-inner,
#urlbar-results *|*.urlbarView-body-inner {
    max-width: var(--v-panel-width, 100%) !important;
}
#urlbar:not(.megabar) *|*.urlbarView-row,
#urlbar-results *|*.urlbarView-row {
    padding-inline-start: 2px !important;
    padding-inline-end: 2px !important;
}
#urlbar:not(.megabar) .search-one-offs {
    padding-inline-start: 5px !important;
    padding-inline-end: 5px !important;
}
/* Прозрачность */
#urlbar > .urlbarView, #urlbar-results, panel[type="autocomplete-richlistbox"], #PopupSearchAutoComplete {
    --arrowpanel-dimmed: rgba(60,60,65,0.4) !important;
    --arrowpanel-dimmed-further: Highlight !important;
    --arrowpanel-dimmed-even-further: transparent !important;
    --panel-separator-color: rgba(250,250,255,0.3) !important;
    --chrome-content-separator-color: rgba(250,250,255,0.3) !important;
    --arrowpanel-border-color: rgba(250,250,255,0.3) !important;
    --arrowpanel-background: rgba(10,10,15,0.8) !important;
    --autocomplete-popup-background: rgba(10,10,15,0.8) !important;
    --autocomplete-popup-color: rgb(240,240,245) !important;
    --arrowpanel-color: rgb(240,240,245) !important;
    --panel-disabled-color: rgb(190,190,195) !important;
    --urlbar-popup-url-color: LightSkyBlue !important;
    --urlbar-popup-action-color: Aquamarine !important;
    border: 1px solid var(--chrome-content-separator-color) !important;
}
#urlbar.megabar {
    background-color: rgba(10,10,15,0.8) !important;
    color: rgb(240,240,245) !important;
}

.tabbrowser-tab:hover > .tab-stack > .tab-background > .tab-line:not([selected="true"]):not([multiselected]) {
    opacity: 0 !important;
    transform: none !important;
    transition: none !important;
}

#bookmarksShowAll,
#organizeBookmarksSeparator,
#menu_bookmarkThisPage,
#menu_bookmarkAllTabs,
#bookmarksToolbarSeparator,
#bookmarksToolbarFolderMenu,
#menu_unsortedBookmarks,
#menu_mobileBookmarks,
#bookmarksMenuItemsSeparator,
#bookmarksMenuItemsSeparator + menuseparator {
  display: none !important;
}

#sidebar-header #sidebar-title[value="Tree Style Tab"] {
    display: none !important;
}

#sidebar-header {
    font-size: 1em !important;
}