Epic has shown off a totally mind boggling tech demo, and it’s probably not what you’d expect. They showed off Unreal Engine 4 running in Firefox, completely without plugins.

The tech demo shows Epic’s Soul and Swing Ninja running at practically native speeds, as if it was completely installed and running off your rig natively.

Check out the video showing the engine running below:

This new partnership between Epic and Mozilla will hopefully bring forth new avenues for developers who want to run their games through your browser.