Use jinja filter to set default title.

qutebrowser/browser/qutescheme.py

@@ -156,11 +156,6 @@ def qute_bookmarks(_url):
     quickmarks = sorted(objreg.get('quickmark-manager').marks.items(),
                         key=lambda x: x[0])  # Sort by name
 
-    # bookmark title is url if bookmark has no title
-    for i, item in enumerate(bookmarks):
-        if not item[1]:
-            bookmarks[i] = (item[0], item[0])
-
     html = jinja.render('bookmarks.html',
                         title='Bookmarks',
                         bookmarks=bookmarks,

qutebrowser/html/bookmarks.html

@@ -53,7 +53,7 @@ th {
     <tbody>
     {% for url, title in bookmarks %}
     <tr>
-        <td class="name"><a href="{{url}}">{{title}}</a></td>
+        <td class="name"><a href="{{url}}">{{title | default(url, true)}}</a></td>
         <td class="url"><a href="{{url}}">{{url}}</a></td>
     </tr>
     {% endfor %}