"sidebarToggle" class="toolbarButton" title="Toggle Sidebar" tabindex="11"
                data-l10n-id="toggle_sidebar" aria-expanded="false" aria-controls="sidebarContainer">
                <span data-l10n-id="toggle_sidebar_label">Toggle Sidebar</span>
              </button>
              <div class="toolbarButtonSpacer"></div>
              <button id="viewFind" class="toolbarButton" title="Find in Document" tabindex="12" data-l10n-id="findbar"
                aria-expanded="false" aria-controls="find