Hey,

  Yesterday I noticed I started to have this problem after I did a registry clean,
and so I came online searching for answers. I came up blank, nothing online had
the solution. So I tried finding out myself, and now the right icon appears. 

In order to get the icon back to normal you must:

1. - Make an HTML file somewhere.
2. - Right click on it and mouse over "Send to" then click "Desktop (create shortcut)"
3. - Now go to the desktop and right click on the shortcut and click "Properties".
4. - Go to the "Shortcut" tab in the properties window.
5. - Near the bottom of the window click "Change icon..."
6. - Now it should say something like could not find file at Drive:/Program Files/Mozilla Firefox/firefox.exe
7. - Now where my example says drive it will display a letter. Whatever letter that is is probably not where you have Firefox installed.
8. - In my case the drive it said was C and I have Firefox installed on my E drive.
9. - Go to the drive it said and make a "Program Files" folder.
10. - Inside of the "Program Files" folder, make a folder named "Mozilla Firefox".
11. - Copy firefox.exe from the drive on which it is installed and then paste it in the "Mozilla Firefox" folder THAT YOU MADE.
12. - Refresh the desktop and the icon should appear!

  Please let me know if this works for you and if not then I will try to help you further. 

           Do not thank me, thank the Lord. He showed me. 
                Gabe

I did this and it didn't work. Seems like it's a Firefox 4 problem as I didn't have issue before.

i think God has forget about folder option in windows 7 is different in windows 98,

LoL , hihi3x

edit: this article should be relink into this web http://de.tk/V2Ou9 "http://www.sevenforums.com/software/86157-blank-html-icons.html"