FireNes brings Nintendo games for the NES and Game Boy in the window of Mozilla Firefox. The free extension integrates an emulator for old Nintendo video games in the web browser. So that the fun can begin FireNes, necessarily the latest version of the Java Runtime Environment on the computer must be installed in addition to Firefox. After a Firefox restart a new entry can be found under the menu item 'View' in the 'Sidebar' entitled FireNes. Here wait circa 2500 and 1400 NES Game Boy Games on their master. A mouse click on an entry in the games FireNes emulation starts in a new browser window. The keyboard controls are free to choose user in the settings of the add-ons. With FireNes Nintendo fans get free games feed in the browser delivered. Unfortunately, only some of the numerous games ran clear in the short test.