diff --git a/lib/nib/config.styl b/lib/nib/config.styl
index 42d7c3d3..c4c0bcef 100644
--- a/lib/nib/config.styl
+++ b/lib/nib/config.styl
@@ -8,4 +8,4 @@ support-for-ie ?= true
  * Default vendor prefixes.
  */
 
-vendor-prefixes ?= webkit moz o ms official
+vendor-prefixes ?= webkit moz ms official
diff --git a/lib/nib/flex.styl b/lib/nib/flex.styl
index 4421da46..8297e964 100644
--- a/lib/nib/flex.styl
+++ b/lib/nib/flex.styl
@@ -2,7 +2,7 @@
  * Vendor "display: flex" support with fallback to obsolete versions.
  */
 
-flex-version ?= box flex
+flex-version ?= flex // box
 
 //
 // 1. Display values
diff --git a/lib/nib/vendor.styl b/lib/nib/vendor.styl
index aed4b91b..59394792 100644
--- a/lib/nib/vendor.styl
+++ b/lib/nib/vendor.styl
@@ -53,13 +53,6 @@ vendor-value(arg, only = null, ignore = null)
       add-property(prop, '-%s-%s' % (prefix arg))
   arg
 
-/*
- * Vendor "box-shadow" support.
- */
-
-box-shadow()
-  vendor('box-shadow', arguments, only: webkit official)
-
 /*
  * Vendor "user-select" support.
  */
@@ -128,7 +121,7 @@ column-span()
  */
 
 column-fill()
-  vendor('column-fill', arguments, only: moz)
+  vendor('column-fill', arguments, only: moz official)
 
 /*
  * Legacy syntax support for background-clip and background-origin
@@ -168,74 +161,12 @@ background-origin()
   legacy-bg-values('background-origin', arguments)
   background-origin: arguments
 
-/*
- * Vendor "background-size" support.
- */
-
-background-size()
-  vendor('background-size', arguments, only: webkit moz official)
-
-/*
- * Vendor "transform" support.
- */
-
-transform()
-  vendor('transform', arguments)
-
-/*
- * Vendor "transform-origin" support.
- */
-transform-origin()
-    vendor('transform-origin', arguments)
-
-/*
- * Vendor "transform-style" support.
- */
-
-transform-style()
-  vendor('transform-style', arguments)
-
 /*
  * Vendor "border-image" support.
  */
 
 border-image()
-  vendor('border-image', arguments, only: webkit moz o official)
-
-/*
- * Vendor "transition" support.
- */
-
-transition()
-  vendor('transition', arguments)
-
-/*
- * Vendor "transition-property" support.
- */
-
-transition-property()
-  vendor('transition-property', arguments)
-
-/*
- * Vendor "transition-duration" support.
- */
-
-transition-duration()
-  vendor('transition-duration', arguments)
-
-/*
- * Vendor "transition-timing-function" support.
- */
-
-transition-timing-function()
-  vendor('transition-timing-function', arguments)
-
-/*
- * Vendor "transition-delay" support.
- */
-
-transition-delay()
-  vendor('transition-delay', arguments)
+  vendor('border-image', arguments, only: webkit moz official)
 
 /*
  * Vendor "backface-visibility" support.
@@ -427,7 +358,7 @@ appearance()
  */
 
 tab-size()
-  vendor('tab-size', arguments, only: moz o official)
+  vendor('tab-size', arguments, only: moz official)
 
 /*
  * Vendor "overflow-scrolling" support.
@@ -441,7 +372,7 @@ overflow-scrolling()
  */
 
 text-overflow()
-  vendor('text-overflow', arguments, only: official o)
+  vendor('text-overflow', arguments, only: official)
 
 /*
  * Vendor "text-size-adjust" support.
@@ -466,7 +397,7 @@ font-smoothing()
     x = pos[1]
     // We don't use moz for simple boder-radius anymore
     // vendor('border-radius-%s%s' % pos, pos[2], only: moz)
-    vendor('border-%s-%s-radius' % pos, pos[2] importance, only: webkit official)
+    vendor('border-%s-%s-radius' % pos, pos[2] importance, only: official)
   else if pos[0] in (top bottom)
     // border-radius: <top | bottom> <n>
     -apply-border-radius(pos[0] left pos[1], importance)
@@ -508,7 +439,7 @@ border-radius()
         if augmented
           -apply-border-radius(pos, importance)
           pos = ()
-  vendor('border-radius', pos, only: webkit official) unless augmented
+  vendor('border-radius', pos, only: official) unless augmented
 
 /**
  * Vendor input-placeholder/placeholder support.