If the application under test makes sound, you probably want to disable this during integration testing.

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You can use the args option to pass parameters to the browser. For Chrome:

Capybara.register_driver :selenium do |app|
  Capybara::Selenium::Driver.new(app, browser: :chrome, args: ["--mute-audio"])
end

I haven't found a corresponding command line option for Firefox Show archive.org snapshot .

Hat tip to kratob Show archive.org snapshot .