Comment by royka118

For all of you old fogies working on angular 1 apps and are running browser tests with karma you can run your tests in firefox with headless mode with a customer launcher. Add the snippet below to your karma conf

``` browsers: ['FirefoxHeadless'], customLaunchers: { FirefoxHeadless: { base: 'Firefox', flags: [ '-headless', ], }, }, ```

Note you need to be running the beta version of firefox, I needed to download it from here https://www.mozilla.org/en-US/firefox/channel/desktop/