WordPress powers approximately 30% of the internet due to its high level of customization and community support, offering a versatile platform for creating a range of websites from simple blogs to advanced sites with modern web technologies. However, achieving cross-browser compatibility in WordPress websites can be challenging due to the varied and sometimes conflicting functionalities introduced by third-party plugins, themes, and custom codes. This challenge is compounded by the fact that different browsers have unique features and support, leading to potential compatibility issues. Developers often need to perform extensive testing and utilize analytics tools to identify and address these issues, ensuring their sites function properly across all major browsers and devices. The process involves adapting CSS, HTML, and JavaScript to meet compatibility requirements, with resources like browser developer blogs and tools like DevTools, Caniuse, and W3Schools assisting in this endeavor. Despite these challenges, the WordPress community offers robust support, enabling developers to eventually overcome these hurdles with persistence and the right strategies.