Agfa Jira is a Google Chrome extension that adds handy actions to a Jira issue page. You can access the actions via the extension icon, or by using keyboard shortcuts. The default shortcuts are listed below:

• Email issue Alt+S (mnemonic: "send")
• Copy Link as Markdown Alt+L
• Copy Title Alt+T

You can always choose your own shortcuts at the bottom of the Chrome Extensions page.

It's tied to the Jira server at Agfa Healthcare, so won't work on other Jira instances.