How to make web screenshots
$ vncserver -geometry 800x800 -depth 24
$ DISPLAY=:1 mozilla-firefox -P "Screenshot" &
$ DISPLAY=:1 mozilla-firefox -P "Screenshot" -remote "openurl(javascript:window.open('http://www.livejournal.com/','','fullscreen=yes,toolbar=no,width=800,height=800'))"
$ DISPLAY=:1 import -window root -resize 200x200 lj-shot.jpg
$ eog lj-shot.jpg

score
$ DISPLAY=:1 mozilla-firefox -P "Screenshot" &
$ DISPLAY=:1 mozilla-firefox -P "Screenshot" -remote "openurl(javascript:window.open('http://www.livejournal.com/','','fullscreen=yes,toolbar=no,width=800,height=800'))"
$ DISPLAY=:1 import -window root -resize 200x200 lj-shot.jpg
$ eog lj-shot.jpg
score