At times you may opt to run UI test cases in headless mode, where the browser is not actually rendered in the front-end. This may come handy when execution speed is of essence or the automation developer does not want to get distracted with an open and active browser during test execution.
It may also be desired in continuous integration environments to speed up execution or to conserve resources.
In accelQ, you can choose headless execution option when you select the browser/OS as part of test run.
Note: Only chrome and firefox currently support headless test execution.