Copy attachment files to clipboard
It would be nice if Zotero would have a new option in the item context menu: "Copy attachments to clipboard". The show file-option kind of does the same, but if you want to copy the file to clipboard for pasting e.g. to email, showing the file is an extra step in this workflow.
It's not really clear to me what mronkko means, though. E-mail has attachments and it has embedded media (such as images). You don't generally paste files themselves into e-mail.
When it comes to the clipboard and drag and drop, which are closely linked, it basically comes down to whether you can do what you want from Firefox or Thunderbird themselves. If so, we can probably do it in Zotero. If not, we probably can't.
The only possible way to implement this would be with platform-specific js-ctypes. Feel free to investigate.
We could probably get Zotero to copy text and image data, though (since, for example, you can copy an image in Firefox and paste into Mail).
I've frequently wished for this feature...like everytime I email an attachment.
+1
In any case, this isn't technically possible at the moment. When we drop Firefox 3.6 support in a future release, we may be able to do more with js-ctypes. (The downside is that js-ctypes are considerably more difficult to work with and require maintaining platform-specific code.)