What is InvalidCookieDomainException in Selenium?

Cookies, which are small data pieces stored on a user's computer, are essential for websites to maintain stateful information and track user activity within their domain. In Selenium, managing these cookies can lead to InvalidCookieDomainException if there is a mismatch between the cookie's domain and the current domain of the web page being tested, such as setting cookies for a different domain, using an incorrect domain format, or attempting to set secure cookies on non-secure pages. Handling these exceptions involves ensuring domain compatibility, dynamically setting domains, and utilizing try-catch blocks. Additionally, new AI-powered tools like testRigor provide a more efficient alternative to Selenium by allowing testers to write test cases in plain English, reducing the need for complex programming and exception handling, thus improving test coverage and minimizing maintenance efforts.