• Add built-in support for Firefox (using GeckoDriver)
• Add support for Symfony HttpBrowser
• Deprecate Goutte support (use HttpBrowser instead)
• Allow to configure RemoteWebDriver timeouts to when using Selenium
• Allow to pass custom environment variables to the built-in web server
• Fix some compatibility issues with PHP WebDriver 1.8
• Upgrade ChromeDriver to version 80.0.3987.106
• Prevent access to fixture files even if the web server is misconfigured