Great time saver... But when you see something like:
...there is something wrong with you :-)
On the bright side, it's isn't eating too much memory (I have two more windows, one with 30 tabs and nother with only 4):
$ ps axv | grep ice 23661 ? Ssl 3:18 45 11540 477799 339092 21.8 /usr/lib/iceweasel/firefox-bin -a firefox
And, now... let's close those tabs!