Added handlers for https://github.com/servo/servo/issues/8623: GetWindowSize IsEnabled(WebElement) IsSelected(WebElement) I am not sure how to actually verify my webdriver code works, if someone can give advice I would make the necessary changes. Thanks! Source-Repo: https://github.com/servo/servo Source-Revision: a877a56e0e603c6cc8e9f951c2ad14b6fe8f9b62