UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:58.0) Gecko/20100101 Firefox/58.0

Steps to reproduce the problem:
1. User visits meme creating website 
2. User creates a meme
3. User wants to copy to clipboard
4. Developer calls clipboard.copy(image)

What is the expected behavior?
Allow method to copy image data to clipboard as bitmap data (image/png, image/jpg).

What went wrong?
Clipboard does not support writing bitmap data to the clipboard. 

Did this work before? No 

Does this work in other browsers? N/A

Chrome version: <Copy from: 'about:version'>  Channel: n/a
OS Version: OS X 10.11
Flash Version: Shockwave Flash 27.0 r0

Writing to the clipboard has valid security concerns, https://w3c.github.io/clipboard-apis/#writing-to-clipboard

We know that. But when the user is on a site that allows them to create images (memes) and they want to share those to imgur or gmail that both support pasting of image data we need to offer a second clipboard option: Show a permissions prompt, "Allow Write to Clipboard?"

The user then grants permission on a per site or per session basis. A new method may be