trying https://addons.mozilla.org/firefox/downloads/file/5146939/video_downloadhelper-10.6.7.2.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  3.70M 100  3.70M   0      0 52.01M      0                              0
100  3.70M 100  3.70M   0      0 51.95M      0                              0
100  3.70M 100  3.70M   0      0 51.93M      0                              0