How to change selenium user agent in selenium-webdriver nodejs land?

Question

How to change selenium user agent in selenium-webdriver nodejs land?

I'm in javascript + mocha + node land.

I have tried setting userAgent and 'user-agent' as keys on capabilities:

var webdriver = require('selenium-webdriver');
var ua = 'Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X)';

var driver = new webdriver.Builder().
     ...
     withCapabilities({ 'browserName': 'firefox',
        userAgent: ua,
        'user-agent': ua,
    }).
    build();

There is this answer which says to use a firefox profile, but that's not exposed. There is no driver.FirefoxProfile nor one exposed globally nor webdriver.FirefoxProfile nor driver.profiles etc.

I have tried Googling and looking the source and the documentation but there is nothing on this.

javascript
node.js
selenium

Answer 1

I succesfully changed phantom's user agent using WD with this code:

var capabilities = {
    'browserName': 'phantomjs',
    'phantomjs.page.settings.userAgent':  'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.11 Safari/537.36'
};
return browser
    .init(capabilities)
...

And this link shows how to change firefox's user agent, although the code provided is for C#/Ruby.

Answer 2

You just need to install the firefox-profile package. Here's a snippet:

var webdriver = require('selenium-webdriver');
var FirefoxProfile = require('firefox-profile');

var myProfile = new FirefoxProfile();        
var capabilities = webdriver.Capabilities.firefox();

// here you set the user-agent preference 
myProfile.setPreference('general.useragent.override', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.131 Safari/537.36');

// attach your newly created profile 
myProfile.encoded(function(encodedProfile) {
    capabilities.set('firefox_profile', encodedProfile);

    // start the browser 
    var wd = new webdriver.Builder().
        withCapabilities(capabilities).
        build();

    wd.get('http://testingsite.com/');
});

Easy peasy!

Answer 3

The answer is that it is impossible.

https://code.google.com/p/selenium/issues/detail?id=6189

Answer 4

You cannot do it with Firefox, but you can do it with Chrome. It's undocumented:

var chrome = require('selenium-webdriver/chrome');

var opts = new chrome.Options();
opts.addArguments(['user-agent="YOUR_USER_AGENT"']);

var driver = new webdriver.Builder().
    withCapabilities(opts.toCapabilities()).
    build();