trying https://addons.mozilla.org/firefox/downloads/file/5111461/auto_tab_discard-0.7.7.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
100 246.9k 100 246.9k   0      0  5.37M      0                              0
100 246.9k 100 246.9k   0      0  5.37M      0                              0
100 246.9k 100 246.9k   0      0  5.32M      0                              0