By default, web scenarios are configured for playback using the browser in which it was recorded. You can configure the scenario to use a different browser or all available browsers.also providesConfigurations that allow you to specify "on the fly" which browser to use for playback. This allows you to have your scenario played back in the browser you recorded in by default, as well as play it back in a different browser (or all browsers) by simply running the appropriateConfiguration.
If you want to ensure that a scenario is played only in the browser with which it was recorded (e.g., because the web page structure is significantly different on other browsers and the scenario would need to be constructed differently on another browser), you can configure the scenario to be played only in the specified browser.