Using Python3 and Selenium with Firefox, the FirefoxProfile.set_preference() method seems to be disreg

Attempting to configure specific preference values on a selenium 2.53.1 operated Firefox 45.0.1 using Python 3.4, such as deactivating JavaScript:

>>> from selenium import webdriver
>>> profile = webdriver.FirefoxProfile()
>>> profile.set_preference('javascript.enabled', False)
>>> driver = webdriver.Firefox(firefox_profile=profile)

Yet, this customization seems to be disregarded, as the about:config displays 

javascript.enabled  true

and JavaScript functions continue to run normally. Despite the fact that about:config reflects it as user-configured. What could be the issue?

javascriptseleniumfirefoxselenium-webdriverpython-3.4

Answer №1

There is currently no way to do it globally through the User Interface.

However, there are still a few other options available. Depending on what you want to block, you may want to consider using a script blocker like

Answer №2

Although an old issue, there is a simple solution for it in Selenium 3.14 and Firefox version 63:

To disable JavaScript, utilize the Options() method:

from selenium.webdriver.firefox.options import Options
options = Options()
options.preferences.update({"javascript.enabled": False})
browser = webdriver.Firefox(options=options)
browser.get('about:config')

This problem was successfully addressed in this thread: How to disable Javascript when using Selenium?

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