I am using Windows XP. When I use Firefox browser, select all and copy and then paste it into some application such as OneNote, it only pastes the text (preserves text formatting) but not the images. I have another PC in which it copies both images and text. Both have same version of FF and mostly everything is the same. I think there is some problem with clipboard. Can you suggest what could be the cause?
This is what solved the problem for me. Set signed.applets.codebase_principal_support to true via about:config. This is not recommended as you cannot limit which sites have these extra privileges.
most likely you are using normal text editor (Notepad, Wordpad etc.) where you paste from clipboard, better use rich text editor like MS-Word (From MS-office suite).
I think it will solve your problem !!