For the latest version of Karma plugins key is not needed

[Valve]

here is my karma.conf.js

  config.set({
    frameworks: ["jasmine", "jasmine-matchers"],
    files: ["../index.js", "test.js"],
    reporters: ["progress"],
    port: 9876,  // karma web server port
    colors: true,
    logLevel: config.LOG_INFO,
    browsers: ["ChromeHeadless"],
    autoWatch: false,
    // singleRun: false, // Karma captures browsers, runs the tests and exits
    concurrency: Infinity,
  })

It works perfectly like that, but if I add the plugin key (as in the readme file), it starts complaining:

Cannot load browser "ChromeHeadless": it is not registered! Perhaps you are missing some plugin?

[JamieMason]

I'm sorry Valentin but I don't know what I can do to help you with this.

[Valve]

Oh sorry, you have it in you readme that the plugins key is required. I thought you'd update the readme or I can do a quick PR to do it.
Thanks!

[JamieMason]

I'd be happy to do that, are you sure there is an issue though with the setup on the readme vs your own? If there is of course I'd be happy to correct it and thanks for pointing it out.