diff --git a/lib/capybara/selenium/driver.rb b/lib/capybara/selenium/driver.rb
index 92eaa149..71407ddd 100644
--- a/lib/capybara/selenium/driver.rb
+++ b/lib/capybara/selenium/driver.rb
@@ -15,7 +15,7 @@ class Capybara::Selenium::Driver < Capybara::Driver::Base
   def browser
     unless @browser
       if firefox?
-        options[:desired_capabilities] ||= Selenium::WebDriver::Remote::Capabilities.firefox
+        options[:desired_capabilities] ||= {}
         options[:desired_capabilities].merge!({ unexpectedAlertBehaviour: "ignore" })
       end
 
diff --git a/spec/selenium_spec_marionette.rb b/spec/selenium_spec_marionette.rb
index ff728567..217e9cef 100644
--- a/spec/selenium_spec_marionette.rb
+++ b/spec/selenium_spec_marionette.rb
@@ -8,7 +8,7 @@ Capybara.register_driver :selenium_marionette do |app|
   Capybara::Selenium::Driver.new(
     app,
     browser: :firefox,
-    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox(marionette: true)
+    desired_capabilities: {marionette: true}
   )
 end
 
@@ -16,7 +16,7 @@ Capybara.register_driver :selenium_marionette_clear_storage do |app|
   Capybara::Selenium::Driver.new(
     app,
     browser: :firefox,
-    desired_capabilities: Selenium::WebDriver::Remote::Capabilities.firefox(marionette: true),
+    desired_capabilities: {marionette: true},
     clear_local_storage: true,
     clear_session_storage: true
   )