Cross browser compatibility is crucial for ensuring that websites function consistently across the multitude of browsers and devices used by a diverse global audience. The rapid increase in the number of websites, internet users, and mobile devices over the past two decades has amplified the need for web developers to test their sites' performance across various platforms to prevent alienating potential users. Developers often exhibit "browser bias" by optimizing for their preferred browsers, inadvertently neglecting others that might be popular in different regions or among their target users. Ensuring compatibility involves staying updated with the latest web technologies, using tools like LambdaTest for comprehensive testing, and incorporating accessibility features to cater to users with disabilities, which also enhances SEO. Neglecting cross browser compatibility can lead to user dissatisfaction, negative perceptions, and loss of business to competitors, emphasizing its importance in maintaining a competitive edge in the digital marketplace.