karma-firefox-launcher

Launcher for Mozilla Firefox.

Installation

The easiest way is to keep karma-firefox-launcher as a devDependency in your package.json.

You can simple do it by:

npm install karma-firefox-launcher --save-dev

Configuration

// karma.conf.js
module.exports = function (config) {
  config.set({
    plugins: [require("karma-firefox-launcher")],
    browsers: [
      "Firefox",
      "FirefoxDeveloper",
      "FirefoxAurora",
      "FirefoxNightly",
    ],
  });
};

You can pass list of browsers as a CLI argument too:

karma start --browsers Firefox,Chrome

To run Firefox in headless mode, append Headless to the version name, e.g. FirefoxHeadless, FirefoxNightlyHeadless.

Environment variables

You can specify the location of the Firefox executable using the following environment variables:

• FIREFOX_BIN (for browser Firefox or FirefoxHeadless)
• FIREFOX_DEVELOPER_BIN (for browser FirefoxDeveloper or FirefoxDeveloperHeadless)
• FIREFOX_AURORA_BIN (for browser FirefoxAurora or FirefoxAuroraHeadless)
• FIREFOX_NIGHTLY_BIN (for browser FirefoxNightly or FirefoxNightlyHeadless)

Custom Firefox location

In addition to Environment variables you can specify location of the Firefox executable in a custom launcher:

browsers: ['Firefox68', 'Firefox78'],

customLaunchers: {
    Firefox68: {
        base: 'Firefox',
        name: 'Firefox68',
        command: '<path to FF68>/firefox.exe'
    },
    Firefox78: {
        base: 'Firefox',
        name: 'Firefox78',
        command: '<path to FF78>/firefox.exe'
    }
}

For more information on Karma see the homepage.