Add support for setting arbitrary Chrome preferences. about chromedriver HOT 11 CLOSED

Chrome, at least the current version, does not recognize a "disable-images" 
command-line switch. Did you see this documented somewhere?

Didn't see it documented. I saw references to it while searching the web and 
thought it'd work. Is there any other way to achieve the same outcome?

There's not an easy way to do this currently. Why do you want to disable 
images? Is it for taking a screenshot?

Could you accomplish the same thing by executing a script that adds some CSS 
that hides all img elements? Maybe something like:

var style = document.createElement('style');
style.innerHTML = "img { display: none !important}";
document.head.appendChild(style);

Let me know if this is not sufficient for you.

I was hoping to disable the images in order to decrease the load time of the 
page. Iterating through a bath of domain names, so cutting the loading time 
will speed up the overall process.

I see. There have been a few requests to set arbitrary chrome preferences. 
Disabling images could be handled in the same way. I'll add a 'chrome.prefs' 
capability for a list of chrome preferences to set. You need to set it to 
{'profile.default_content_settings': {'images': 2}}. Chrome preferences change 
over time, so you may have to change this in the future.

This has been fixed and should be in ChromeDriver 19.0.1068.0.

Here is an example in Java:

Map<String, Object> contentSettings = new HashMap<String, Object>();
contentSettings.put("images", 2);

Map<String, Object> preferences = new HashMap<String, Object>();
preferences.put("profile.default_content_settings", contentSettings);

DesiredCapabilities caps = DesiredCapabilities.chrome();
caps.setCapability("chrome.prefs", preferences);

For C# using reflection:
            var imageSetting = new Dictionary<string, object>();
            imageSetting.Add("images", 2);
            Dictionary<string, object> content = new Dictionary<string, object>();
            content.Add("profile.default_content_settings", imageSetting);

            var prefs = new Dictionary<string, object>();
            prefs.Add("prefs", content);

            var options = new ChromeOptions();
            var field = options.GetType().GetField("additionalCapabilities", BindingFlags.Instance | BindingFlags.NonPublic);
            if (field != null)
            {
                var dict = field.GetValue(options) as IDictionary<string, object>;
                if (dict != null)
                    dict.Add(ChromeOptions.Capability, prefs);
            }

If you need other ChromeOptions you will need to add them manually using the 
dictionary too. The reflection bit is necessary as ChromeOptions overrides any 
chrome.prefs setting

What would be the proper way to achieve this in python?