Shouldn't have to be a pain? Browser plugin to paste content to editor window. Then something that runs the document its pasted into when you've read it? Howev

Shouldn't have to be a pain? Browser plugin to paste content to editor window. Then something that runs the document its pasted into when you've read it? However, copy, paste, (save as a script|paste in terminal), run isn't exactly the most strenuous task in the history of man either. So it'd be a fairly meaningless chain of plugins for close to zero benefit.