Testing web applications on real browsers ensures accuracy in assessing user experience, but it can be slow and resource-intensive. To address this, many developers use headless browsers, which simulate real browsers without a graphical interface, enabling faster and more efficient tests. Cypress, a popular testing framework, supports headless mode on browsers like Chrome, Firefox, and WebKit, offering benefits such as speed, resource efficiency, and automation without the need for a GUI. This approach is especially useful in continuous integration (CI) pipelines due to its reduced resource consumption and faster execution. Developers can perform Cypress testing in headless mode both locally and on cloud platforms like LambdaTest, which supports parallel testing across multiple browsers, allowing for comprehensive testing across various configurations without the need for expensive hardware or software. By running tests in headless mode, developers can enhance their testing processes, ensuring their applications work seamlessly across different environments while saving time and resources.