# karma-firefox-launcher > Launcher for Mozilla Firefox. ## Installation The easiest way is to keep `karma-firefox-launcher` as a devDependency in your `package.json`. ```json { "devDependencies": { "karma": "~0.10", "karma-firefox-launcher": "~0.1" } } ``` You can simple do it by: ```bash npm install karma-firefox-launcher --save-dev ``` ## Configuration ```js // karma.conf.js module.exports = function(config) { config.set({ browsers: ['Firefox', 'FirefoxAurora', 'FirefoxNightly'], }); }; ``` You can pass list of browsers as a CLI argument too: ```bash karma start --browsers Firefox,Chrome ``` ---- For more information on Karma see the [homepage]. [homepage]: http://karma-runner.github.com