The upcoming release of browser versions 100 by Google Chrome and Mozilla Firefox may cause errors and compatibility issues for some websites. To mitigate this risk, software development teams should test their websites on both Chrome 100 and Firefox 100 before each version is generally available. Various testing options are available, including manual live tests, automated tests using the Sauce Labs Platform Configurator, and forcing the Chrome major version to 100 in automated test scripts. Incorporating cross-browser testing into a testing strategy is crucial to ensure websites look, function, and perform as designed across different browser/OS/device combinations.