Epic has been making a push for browsers to support its popular Unreal Engine. To that end, Mozilla and Epic have teamed up to show a demo of UE4 demos running in the Firefox browser without plugins.

The brief video shows demos of Epic's Soul and Swing Ninja at near-native speeds. This follows a tech demo for Unreal Engine 3 running in-browser released last year, which was also done in partnership with Mozilla. It ends with an invitation for Game Developers Conference attendees, which is set to take place next week in San Francisco.