Selenium WebDriver 3 Practical Guide - Second Edition

Understanding frozen preferences

Now, let's go back to the big list of frozen preferences that user.js contains, which we saw earlier. The Firefox Driver thinks that a test-script developer doesn't have to deal with them and doesn't allow those values to be changed. Let's pick one frozen preference and try to change its values in our code. Let's consider the browser.shell.checkDefaultBrowser preference, whose value FirefoxDriver implementers thought should be set to false so that the Firefox browser does not ask you whether to make Firefox your default browser, if it is not already, when you are busy executing your test cases. Ultimately, you don't have to deal with the pop-up itself in your test scripts. Apart from setting the preference ...