A browser extension for Google Chrome, Firefox, and Opera that lets you open external links on Hacker News in a new tab by default.
A new option is placed into the navigation bar at the top of Hacker News and your setting is saved to localStorage, so your preference is remembered for the next time you visit the site.
If you're a reader of Hacker News give a try!
Please feel free to send me an email or contact me on Twitter if you have any suggestions or feedback. Thanks!