structuredAttrs is enabled

trying https://addons.mozilla.org/firefox/downloads/file/5177756/single_file-1.33.0.xpi
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed

  0      0   0      0   0      0      0      0                              0
100  1.51M 100  1.51M   0      0  5.64M      0                              0
100  1.51M 100  1.51M   0      0  5.63M      0                              0
100  1.51M 100  1.51M   0      0  5.63M      0                              0