diff --git a/web/viewer.css b/web/viewer.css
index 46a7c6f38..6ab3380a3 100644
--- a/web/viewer.css
+++ b/web/viewer.css
@@ -236,6 +236,7 @@ html[dir='rtl'] #sidebarContent {
   right: 0;
   bottom: 0;
   left: 0;
+  outline: none;
 }
 .loadingInProgress #viewerContainer {
   top: 39px;
diff --git a/web/viewer.html b/web/viewer.html
index 66dbff139..9eba078f0 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -222,7 +222,7 @@ limitations under the License.
                     data-l10n-id="page_rotate_cw" ></menuitem>
         </menu>
 
-        <div id="viewerContainer">
+        <div id="viewerContainer" tabindex="0">
           <div id="viewer" contextmenu="viewerContextMenu"></div>
         </div>