diff --git a/scrapy_selenium/middlewares.py b/scrapy_selenium/middlewares.py
index 201db2c..736ca91 100644
--- a/scrapy_selenium/middlewares.py
+++ b/scrapy_selenium/middlewares.py
@@ -14,7 +14,7 @@ class SeleniumMiddleware:
     """Scrapy middleware handling the requests using selenium"""
 
     def __init__(self, driver_name, driver_executable_path,
-        browser_executable_path, command_executor, driver_arguments):
+        browser_executable_path, command_executor, driver_arguments, experimental_options, extensions):
         """Initialize the selenium webdriver
 
         Parameters
@@ -45,6 +45,10 @@ def __init__(self, driver_name, driver_executable_path,
             driver_options.binary_location = browser_executable_path
         for argument in driver_arguments:
             driver_options.add_argument(argument)
+        for option, value in experimental_options.items():
+            driver_options.add_experimental_option(option, value)
+        for extension in extensions:
+            driver_options.add_extension(extension)
 
         driver_kwargs = {
             'executable_path': driver_executable_path,
@@ -74,6 +78,8 @@ def from_crawler(cls, crawler):
         browser_executable_path = crawler.settings.get('SELENIUM_BROWSER_EXECUTABLE_PATH')
         command_executor = crawler.settings.get('SELENIUM_COMMAND_EXECUTOR')
         driver_arguments = crawler.settings.get('SELENIUM_DRIVER_ARGUMENTS')
+        driver_experimental_options = crawler.settings.get('SELENIUM_EXPERIMENTAL_OPTIONS', {})
+        driver_extensions = crawler.settings.get('SELENIUM_EXTENSIONS', [])
 
         if driver_name is None:
             raise NotConfigured('SELENIUM_DRIVER_NAME must be set')
@@ -87,7 +93,9 @@ def from_crawler(cls, crawler):
             driver_executable_path=driver_executable_path,
             browser_executable_path=browser_executable_path,
             command_executor=command_executor,
-            driver_arguments=driver_arguments
+            driver_arguments=driver_arguments,
+            experimental_options=driver_experimental_options,
+            extensions=driver_extensions
         )
 
         crawler.signals.connect(middleware.spider_closed, signals.spider_closed)