var node = document.createElement("button");
            var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
            var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
            node.classList.add('button-toolbar');
            node.id = "vivaldiToggleSidebar";
            node.setAttribute("title", "Panel Toggle");
            node.setAttribute("tabindex", "-1");
            svg.setAttributeNS(null, "width", "26");
            svg.setAttributeNS(null, "height", "26");
            svg.setAttributeNS(null, "viewBox", "0 0 26 26");
            path.style = "d: path('M 4 6 h 18 v 2.5 h -3.5 v 11.5 h -2.5 v -9.5 h -6 v 9.5 h -2.5 v -11.5 h -3.5 Z')";
            bookmarkbar.appendChild(node);
            node.appendChild(svg);
            svg.appendChild(path);