Fixes for modern Capybara versions.

lib/persistent_selenium/browser.rb

@@ -36,6 +36,10 @@ module PersistentSelenium
       {}
     end
 
+    def browser_initialized?
+      false
+    end
+
     def visit(path)
       if !path[/^http/]
         path = @app_host + path

lib/persistent_selenium/driver.rb

@@ -10,7 +10,16 @@ require 'persistent_selenium/drb'
 Capybara.register_driver :persistent_selenium do |app|
   require 'drb'
 
-  service = DRb.start_service
+  module DRb
+    class DRbObject
+      def method(name)
+        method_missing(:method, name)
+      end
+    end
+  end
+
+  DRb.start_service
+
   browser = DRbObject.new nil, PersistentSelenium.url
 
   server = Capybara::Server.new(app)