FirefoxOptions configuration in Selenium Java - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is FirefoxOptions used for in Selenium?

FirefoxOptions is used to customize and configure Firefox browser settings before launching it in Selenium tests. It allows setting preferences, enabling headless mode, and adding arguments.

beginner

How do you enable headless mode using FirefoxOptions?

Use options.setHeadless(true); or options.addArguments("-headless"); to run Firefox without opening a visible window.

intermediate

Which method adds a custom Firefox profile to FirefoxOptions?

Use options.setProfile(FirefoxProfile profile); to add a custom Firefox profile with specific preferences or extensions.

intermediate

How can you disable Firefox's default browser check using FirefoxOptions?

Set the preference browser.shell.checkDefaultBrowser to false using options.addPreference("browser.shell.checkDefaultBrowser", false);.

advanced

What is the benefit of using FirefoxOptions over DesiredCapabilities?

FirefoxOptions provides a clearer, more modern API to configure Firefox-specific settings and is preferred over the deprecated DesiredCapabilities for better maintainability and support.

Which method is used to start Firefox in headless mode with FirefoxOptions?

A options.addArguments("--no-headless");

B options.enableHeadless();

C options.setHeadless(true);

D options.setHeadlessMode(false);

The correct method is setHeadless(true) to enable headless mode in FirefoxOptions.

How do you add a custom Firefox profile to FirefoxOptions?

A options.setProfile(profile);

B options.addProfile(profile);

C options.useProfile(profile);

D options.loadProfile(profile);

The method setProfile() is used to add a FirefoxProfile to FirefoxOptions.

Which preference disables the default browser check in Firefox using FirefoxOptions?

A shell.browser.checkDefault

B browser.shell.checkDefaultBrowser

C browser.check.default

D browser.default.checkShell

The correct preference is browser.shell.checkDefaultBrowser.

What is the main advantage of using FirefoxOptions instead of DesiredCapabilities?

A It disables all Firefox extensions automatically

B It is deprecated and should not be used

C It only works with Chrome

D It provides a modern, Firefox-specific configuration API

FirefoxOptions offers a modern and clearer API tailored for Firefox configuration.

Which of the following is NOT a valid way to configure FirefoxOptions?

A options.enableJavaScript(false);

B options.setHeadless(true);

C options.addArguments("-private");

D options.setProfile(profile);

There is no enableJavaScript(false) method in FirefoxOptions; JavaScript is controlled via preferences, not a direct method.

Explain how to configure Firefox to run in headless mode using FirefoxOptions in Selenium.

Think about how to make Firefox run without opening a window.

Describe how to add a custom Firefox profile and set preferences using FirefoxOptions.

Profiles let you customize browser settings and extensions.