take a screenshot of a webpage that doesn't fit on my screen...

[Michael Van Dorpe]

I looked at 'import', but I can't find a way to do what I want to do:

I have a webpage open in Firefox, and I want a screenhot of that: not 
just of what I can see on my screen, but also of everything that I need 
to scroll down for in Firefox to be able to see it...  I hope you 
understand what I mean.

Thank you very much for helping me :-)