setting request headers in selenium

Webdriver doesn't contain an API to do it. See issue 141 from Selenium tracker for more info. The title of the issue says that it's about response headers but it was decided that Selenium won't contain API for request headers in scope of this issue. Several issues about adding API to set request headers have been marked as duplicates: first, second, third.

Here are a couple of possibilities that I can propose:

1. Use another driver/library instead of selenium
2. Write a browser-specific plugin (or find an existing one) that allows you to add header for request.
3. Use browsermob-proxy or some other proxy.

I'd go with option 3 in most of cases. It's not hard.

Note that Ghostdriver has an API for it but it's not supported by other drivers.

For those people using Python, you may consider using Selenium Wire which can set request headers as well as provide you with the ability to inspect requests and responses.

from seleniumwire import webdriver  # Import from seleniumwire

# Create a new instance of the Chrome driver (or Firefox)
driver = webdriver.Chrome()

# Create a request interceptor
def interceptor(request):
    del request.headers['Referer']  # Delete the header first
    request.headers['Referer'] = 'some_referer'

# Set the interceptor on the driver
driver.request_interceptor = interceptor

# All requests will now use 'some_referer' for the referer
driver.get('https://mysite')

Install with:

pip install selenium-wire

I had the same issue. I solved it downloading modify-headers firefox add-on and activate it with selenium.

The code in python is the following

fp = webdriver.FirefoxProfile()
path_modify_header = 'C:/xxxxxxx/modify_headers-0.7.1.1-fx.xpi'
fp.add_extension(path_modify_header)

fp.set_preference("modifyheaders.headers.count", 1)
fp.set_preference("modifyheaders.headers.action0", "Add")
fp.set_preference("modifyheaders.headers.name0", "Name_of_header") # Set here the name of the header
fp.set_preference("modifyheaders.headers.value0", "value_of_header") # Set here the value of the header
fp.set_preference("modifyheaders.headers.enabled0", True)
fp.set_preference("modifyheaders.config.active", True)
fp.set_preference("modifyheaders.config.alwaysOn", True)

driver = webdriver.Firefox(firefox_profile=fp)