Why can't I copy and paste a picture onto the desktop with Firefox?

[mario]

Ok now, I always copy pictures and paste them onto the desktop (that's where I put them a lot of times until I sort them). But on Firefox, there's no "paste" option when I right click on the desktop. I noticed that I have to click "save as" on the photo I'm copying, and then select where to save it to. THAT'S A MAJOR PAIN!

Is there ANY way to get that convenient "paste" option back for pasting onto the desktop with Firefox?

I swear, I downloaded Firefox because Internet Explorer was giving me TONS of problems. And right away, I find something I HATE about it. *sigh*
I forgot to explain. The "paste option" IS there. But it's unselectable.
I have a Windows 7 PC.
And DON'T TELL ME TO SWITCH TO GOOGLE CHROME. I had that and I totally HATED IT! Couldn't figure out ANYTHING on it.
WHAT DOES MobileTechy mean by "'ctrl & c' .. 'ctrl & v' .. to copy & paste"?

[MobileTechy]

did you try the 'ctrl & c' .. 'ctrl & v' .. to copy & paste

[muhammad Qasim]

migrate to chrome its better

[Roxten]

You may Setup your Windows again. And Update your Firefox Version

[PokerPlayer]

I can't do it either on firefox. You can copy an image but you can't paste it to the desktop, only another program that will allow images to be pasted.