Automated testing
From Freephile Wiki
Automated testing ranges from the front-end (browser testing) to the back-end (unit testing and integration testing) and is part of the Continuous Integration systems that allow software to be deployed continuously with quality.
For browser automation, one good reference is the (Firefox) Mozilla reference at https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing/Automated_testing