diff --git a/lib/flowerbox/runner/firefox.rb b/lib/flowerbox/runner/firefox.rb
index a86cf3f..bff7786 100644
--- a/lib/flowerbox/runner/firefox.rb
+++ b/lib/flowerbox/runner/firefox.rb
@@ -8,7 +8,7 @@ class Flowerbox::Runner::Firefox < Flowerbox::Runner::Selenium
   end
 
   def browser
-    @browser ||= ::Selenium::WebDriver.for(:firefox)
+    Flowerbox.browsers[:firefox] ||= ::Selenium::WebDriver.for(:firefox)
   end
 end
 
diff --git a/lib/flowerbox/runner/node.rb b/lib/flowerbox/runner/node.rb
index 99464d0..92f502b 100644
--- a/lib/flowerbox/runner/node.rb
+++ b/lib/flowerbox/runner/node.rb
@@ -1,5 +1,4 @@
 require 'tempfile'
-require 'flowerbox/delivery/server'
 require 'json'
 
 module Flowerbox