add comment about why DOM is preferred over singlefile for readability parsing

archivebox/extractors/readability.py

@@ -99,6 +99,8 @@ def save_readability(link: Link, out_dir: Optional[str]=None, timeout: int=TIMEO
     except (Exception, OSError) as err:
         status = 'failed'
         output = err
+
+        # prefer Chrome dom output to singlefile because singlefile often contains huge url(data:image/...base64) strings that make the html too long to parse with readability
         cmd = [cmd[0], './{dom,singlefile}.html']
     finally:
         timer.end()

archivebox/templates/admin/base.html

@@ -177,6 +177,7 @@
                 }
             </script>
         {% endif %}
+        
         <script>
             $ = django.jQuery;
             $.fn.reverse = [].reverse;