@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
#placesContext .box-inherit.scrollbox-innerbox {
    -moz-binding: url("./bindings/placesContext.xml#extraMenuitems") !important;
}

/*Цвет папок*/
treechildren::-moz-tree-image(container),
.bookmark-item[container="true"] {
    fill: #0078ad !important;
    fill-opacity: 1 !important;
}


/*Панель поиска вверху*/
.browserContainer findbar {
-moz-box-ordinal-group: 0 !important;
}
.findbar-container {-moz-box-direction: reverse !important;}

.browserContainer findbar, #viewSource #FindToolbar {
-moz-box-ordinal-group: 0;
position: fixed !important;
right: 30px;
margin-top: -1px !important;
box-shadow: 1px 2px 3px rgba(0, 0, 0, .25) !important;
border: 1px solid threedshadow !important;
border-top: none !important;
border-radius: 0 0 3px 3px;
transition-property: margin-top, opacity, visibility !important;
}
.....

@-moz-document
url(chrome://browser/content/places/places.xul),
url(chrome://browser/content/places/bookmarksSidebar.xul) {
    #placesContext_editSeparator {

        --code:((sep, popup) => {
            var label = "\u041F\u0430\u043F\u043A\u0430 \u0437\u0430\u043A\u043B\u0430\u0434\u043A\u0438";
            var listener = {
                handleEvent(e) {
                    if (e.target != popup || this.shouldHide(e)) return;

                    var menuitem = document.createElement("menuitem");
                    menuitem.setAttribute("label", label);
                    menuitem.setAttribute("oncommand", "creator.goParentFolder();");
                    menuitem.creator = this;
                    sep.before(menuitem);

                    this.handleEvent = e => {
                        if (e.target != popup) return;
                        var sh = this.shouldHide();
                        if (Boolean(menuitem.clientHeight) ^ sh) return;
                        if ((menuitem.hidden = sh)) return;
                        menuitem.disabled = false;
                    }
                },
                shouldHide() {
                    var node = popup._view.selectedNodes.length == 1
                        && popup._view.selectedNode;
                    return !node || !PlacesUtils.nodeIsBookmark(node)
                        || node.parent.type != node.RESULT_TYPE_QUERY;
                },
                get goParentFolder() {
                    var tree = popup._view;
                    if (tree.id[0] == "b") {
                        delete this.library;
                        var func = () => this.sidebar(tree);
                    } else {
                        delete this.sidebar;
                        var list = document.getElementById("placesList");
                        var func = () => this.library(popup._view, list);
                    }
                    delete this.goParentFolder;
                    return this.goParentFolder = func;
                },
                sidebar(tree) {
                    var {bookmarkGuid} = tree.selectedNode;
                    if (tree.result.root.uri.startsWith("place:terms="))
                        tree.place = tree.place;
                    tree.selectItems([bookmarkGuid]);
                    this.scroll(tree);
                },
                async library(tree, list) {
                    var {bookmarkGuid} = tree.selectedNode;
                    var {parentGuid} = await PlacesUtils.bookmarks.fetch(bookmarkGuid);

                    if (PlacesUtils.getConcreteItemGuid(list.selectedNode) == parentGuid)
                        list.selectItems([PlacesUtils.virtualAllBookmarksGuid]);
                    else {
                        var rows = list.view._rows, lastRow = rows[rows.length - 1];
                        if (lastRow.bookmarkGuid == PlacesUtils.virtualAllBookmarksGuid)
                            lastRow.containerOpen = true;
                    }
                    list.selectItems([parentGuid]);
                    await new Promise(resolve => setTimeout(resolve, 100));

                    this.scroll(list);
                    tree.selectItems([bookmarkGuid]);
                    this.scroll(tree);
                },
                scroll(tree) {
                    var pos = 0.5, tbo = tree.treeBoxObject;
                    var ind = tbo.view.selection.currentIndex;
                    var first = tbo.getFirstVisibleRow();
                    var visibleRows = tbo.height/tbo.rowHeight;
                    var newFirst = ind - pos*visibleRows + 1;
                    tbo.scrollByLines(Math.round(newFirst - first));
                }
            };
            listener.handleEvent({target: popup});
            popup.addEventListener("popupshowing", listener);
            this.destructor = () => popup.removeEventListener("popupshowing", listener);
        })(this, parentNode);

        -moz-binding: url('data:text/xml,\
            <bindings xmlns="http://www.mozilla.org/xbl"><binding id="goParentFolder"><implementation>\%0A\
                <constructor>eval(windowUtils.getVisitedDependentComputedStyle(this, "", "--code"));</constructor>\%0A\
                <destructor>destructor();</destructor>\%0A\
            </implementation></binding></bindings>'
        );
    }
}