Add rel=noopener to target=_blank links

From https://developers.google.com/web/tools/lighthouse/audits/noopener:
- new pages will run in separate processes, avoiding any performance
  intermingling impacts
- new pages won't have access to current page's window object via JavaScript

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Wallabag/CoreBundle/Resources/views/themes/material/layout.html.twig b/src/Wallabag/CoreBundle/Resources/views/themes/material/layout.html.twig
index f0012ad9..052a8c01 100644
--- a/src/Wallabag/CoreBundle/Resources/views/themes/material/layout.html.twig
+++ b/src/Wallabag/CoreBundle/Resources/views/themes/material/layout.html.twig
@@ -143,7 +143,7 @@
                     </div>
                     <div class="col s12 l4">
                         <p class="footer-text">
-                            {{ 'footer.wallabag.powered_by'|trans }} <a target="_blank" href="https://wallabag.org" class="grey-text text-lighten-4">wallabag</a> –
+                            {{ 'footer.wallabag.powered_by'|trans }} <a target="_blank" rel="noopener" href="https://wallabag.org" class="grey-text text-lighten-4">wallabag</a> –
                             <a class="grey-text text-lighten-4" href="{{ path('about') }}">{{ 'footer.wallabag.about'|trans|lower }}</a>
                         </p>
                     </div>