Browser compatibility is the ability of the Web browser (IE, Firefox, Chrome, etc.) to properly interpret the programming language that renders Web pages. Programming language is understood a little differently by each Web browser and the differences are subtle in most cases. The majority of websites are built to be compatible with the “current” browser version.
As our website grows and adapts to newer programming languages and browsers, it can sometimes outgrow older browser versions which is why it's important to keep your browser up to date. If you're experiencing slow site performance or constant "glitches", you may want to switch browsers or update your current version to ensure the best results.