# is-firefox > Check if browser is Firefox *User agent sniffing is [considered](https://developer.mozilla.org/en-US/docs/Browser_detection_using_the_user_agent) bad practice and should be avoided if possible.* ## Install ``` $ npm install --save is-firefox ``` ## Usage ```js var isFirefox = require('is-firefox'); console.log(isFirefox); //=> false ``` ## License MIT © [Andreas Gillström](http://github.com/gillstrom)