Accelerated Mobile Pages (AMP) are an open-source project backed by Google, designed to ensure mobile website content renders almost instantly, which is crucial given the significant rise in mobile users over the years. With the growing diversity of mobile devices, ensuring cross-browser compatibility for AMP pages is essential to provide a seamless user experience across various browsers such as iOS Safari, Opera, UC Browser, and Chrome. However, several web elements and properties are not supported by certain mobile browsers, such as the older Android Native Browser, Blackberry, and Opera, which can lead to compatibility issues. To mitigate these issues, AMP pages should utilize inline CSS styles, validate AMP codes using AMP project validators, and conduct comprehensive cross-browser testing using platforms like LambdaTest to ensure compatibility across more than 500 mobile browser and OS combinations. This meticulous approach to development and testing ensures AMP pages offer a consistent and efficient user experience, crucial for maintaining user engagement and optimizing mobile ad revenue.