Choose a visible or headless run

Use a visible browser while checking a new workflow. Use headless execution when you want the test to run without a visible browser window.

Project setting	Effect
HEAD_LESS=N	Visible execution; the library default.
HEAD_LESS=Y	Execution without a visible browser window.
WAIT_TIME	Maximum wait for supported operations, in seconds; default 90.

Set these values in your test project's supported environment configuration before starting the run. Project-specific settings may override the library default. Changing an environment file does not update a browser that is already running.

Headless runs still need a suitable viewport. If a navigation control only appears in a wide layout, ask your project owner to configure an appropriate execution size.

See the runtime user guide.