When I'm looking at a Gmail conversation or message, I'd like to copy a shareable link to a given message in the conversation. I want to share the link with someone else who already has a copy of the message.
I can construct a link to the message by clicking Show Original, copying the value of the Message-ID header, and pasting it into a link template like https://mail.google.com/mail/u/0/#search/rfc822msgid%3A{Message-ID}.
I'd prefer a Chrome Extension or Gmail Labs feature that adds a button to "Get Link" to the Gmail conversation or message view.
Does an extension or labs feature exist? If so, where can I find it?