JIRA - Open external links in a new tab

Numerous users have requested this feature for JIRA but it has not - yet - landed on JIRA Cloud (https://jira.atlassian.com/browse/JRASERVER-9380). This is a tiny Chrome extension (less than 30 lines of code) - feedback is welcome!

Features

* JIRA Cloud (*.atlassian.net)
* Opens external links in a new tab
* Internal links between Atlassian products should not be affected
* Ignores `mailto:` links

Github: https://github.com/Unibozu/jira-new-tab