disable images loading about tor-browser-selenium

[gunesacar]

You may want to pass the preference during initialization, since changes in profile preferences may not immediately be taken into account. See the new test code for an example:

tor-browser-selenium/tbselenium/test/test_disable_javascript.py

Lines 17 to 30 in 698c4a3

	def test_disable_images(self):
	"""Make sure we disable images via a pref."""
	PREF_DICT = {
	"permissions.default.image": 2,
	# 2 means block images from loading.
	# http://kb.mozillazine.org/Permissions.default.image#2
	}
	with TBDriverFixture(TBB_PATH, pref_dict=PREF_DICT) as driver:
	driver.load_url(LOCAL_IMG_TEST_URL)
	is_img_loaded = driver.execute_script(
	"return document.querySelector('img#onion').complete === true")
	assert not is_img_loaded, "Image should not be loaded"