Screenshot of ENTIRE window that is particulary behind desktop edges
 

HI, I'M TRYING TO CAPTURE A FIREFOX WINDOW, THAT HAS BIGGER SIZE THAN MY DESKTOP, BUT WHEN I USE xwd, import, GIMP or KSnapshot, OUTPUT IS ONLY AS BIG AS MY DESKTOP ! :/.
IN BETTER CASES (SUCH AS KSNAPSHOT) IS HIDDEN AREA FILLED WITH BLACK COLOR :/

CAN YOU RECOMEND ME ANY OTHER TOOLS?

THX

Most screenshot programs just dump the screen's framebuffer to a file, meaning all you get is what is displayed. You could try using xinerama extensions to give you a larger virtual screen and then dumping that with some of the screencap tools.

Also, please try to avoid typing in all caps. By many, it is considered rude. At the very least, it makes your posts harder to read.

done
 

So i solved it this way:

There is a extension for Firefox called Pearl Crescent Page Saver, that can save whole window, and Web Developer extension allows you to resize Firefox window to any size. So it wasn't problem to capture a 8000x6000 px large map generated by server :)

& thx for all