Firefox configuration in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of Firefox profile in Selenium testing?

A Firefox profile stores user preferences, extensions, and settings. In Selenium, it helps customize browser behavior during tests, like disabling pop-ups or setting download folders.

intermediate

How do you set a custom download folder in Firefox using Selenium Python?

You create a Firefox profile, set the preference 'browser.download.dir' to the folder path, and set 'browser.download.folderList' to 2 to use the custom folder.

beginner

What is the role of FirefoxOptions in Selenium?

FirefoxOptions lets you configure Firefox browser settings like headless mode, binary location, and attaching a profile before starting the browser in Selenium tests.

beginner

How can you run Firefox in headless mode using Selenium Python?

Use FirefoxOptions and call options.headless = True before passing it to the WebDriver. This runs Firefox without opening a visible window.

intermediate

Why is it important to disable Firefox's default download dialog in automated tests?

Disabling the download dialog prevents tests from hanging or failing because the dialog waits for user interaction. Setting preferences to auto-download files ensures smooth automation.

Which Firefox preference disables the download dialog to auto-save files in Selenium?

A browser.helperApps.neverAsk.saveToDisk

B browser.download.folderList

C browser.download.manager.showWhenStarting

D browser.download.dir

Setting 'browser.helperApps.neverAsk.saveToDisk' with MIME types disables the download dialog and auto-saves files.

How do you apply a Firefox profile to the WebDriver in Selenium Python?

A Profiles are not used in Selenium

B Set profile path in WebDriver constructor directly

C Pass the profile to FirefoxOptions and then to WebDriver

D Use driver.set_profile() method

You create a FirefoxProfile, set preferences, pass it to FirefoxOptions, then pass options to WebDriver.

What does setting 'browser.download.folderList' to 2 do?

A Uses the default downloads folder

B Uses the desktop as download folder

C Disables downloads

D Uses a custom download folder specified by 'browser.download.dir'

Value 2 tells Firefox to use the folder set in 'browser.download.dir' for downloads.

Which method enables headless mode in FirefoxOptions?

A options.set_headless()

B options.headless = True

C options.enable_headless()

D options.headless_mode()

In Selenium Python, you set 'options.headless = True' to run Firefox without GUI.

Why might you want to set 'browser.download.manager.showWhenStarting' to False?

A To hide the download manager and avoid interruptions

B To show the download manager on start

C To disable downloads

D To clear download history

Setting it to False hides the download manager window, preventing test interruptions.

Explain how to configure Firefox to automatically download files to a specific folder in Selenium Python.

Think about preferences that control download folder and dialogs.

Describe how to run Firefox in headless mode using Selenium Python and why it is useful.

Focus on options and benefits of headless mode.