Can't turn off images in Selenium / Firefox

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I am looking to disable images in Firefox when using Selenium. It should be a simple update of the preferences in firefox, which is documented on the instructions on Disable images in Selenium Python

However when i run, images display, and when i enter about:config, the value for permissions.default.image is still 1, rather than 2 which i have tried setting it to.

My code (written in Python) is:

from selenium import webdriver
firefox_profile
= webdriver.FirefoxProfile()
firefox_profile
.set_preference("permissions.default.image", 2)
driver
= webdriver.Firefox(firefox_profile)
driver
.get(web_address)

For reference, this code works perfect with another change to preference e.g. turning off csv files with the line firefox_profile.set_preference("permissions.default.stylesheet",2). The only difference i can tell between the csv setting and the image one, is that the line permissions.default.image already exists in about:config (i.e. without me setting it), however the line permissions.default.stylesheet does not. … it seems that i can add new lines in with the value i want, but not change an existing one (or it is beein over-ridden by Selenium after i enter my value).

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From what I understand, this problem is related to the following Firefox issues:

That means that permissions.default.image is frozen, cannot be changed and does nothing.


Alternatives:

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