diff --git a/common/static/sass/bourbon/css3/_animation.scss b/common/static/sass/bourbon/css3/_animation.scss
index 08c3dbf157..070a85eedb 100644
--- a/common/static/sass/bourbon/css3/_animation.scss
+++ b/common/static/sass/bourbon/css3/_animation.scss
@@ -3,50 +3,50 @@
 
 // Official animation shorthand property.
 @mixin animation ($animations...) {
-  @include prefixer(animation, $animations, webkit moz spec);
+  @include prefixer(animation, $animations, spec);
 }
 
 // Individual Animation Properties
 @mixin animation-name ($names...) {
-  @include prefixer(animation-name, $names, webkit moz spec);
+  @include prefixer(animation-name, $names, spec);
 }
 
 
 @mixin animation-duration ($times...) {
-  @include prefixer(animation-duration, $times, webkit moz spec);
+  @include prefixer(animation-duration, $times, spec);
 }
 
 
 @mixin animation-timing-function ($motions...) {
 // ease | linear | ease-in | ease-out | ease-in-out
-  @include prefixer(animation-timing-function, $motions, webkit moz spec);
+  @include prefixer(animation-timing-function, $motions, spec);
 }
 
 
 @mixin animation-iteration-count ($values...) {
 // infinite | <number>
-  @include prefixer(animation-iteration-count, $values, webkit moz spec);
+  @include prefixer(animation-iteration-count, $values, spec);
 }
 
 
 @mixin animation-direction ($directions...) {
 // normal | alternate
-  @include prefixer(animation-direction, $directions, webkit moz spec);
+  @include prefixer(animation-direction, $directions, spec);
 }
 
 
 @mixin animation-play-state ($states...) {
 // running | paused
-  @include prefixer(animation-play-state, $states, webkit moz spec);
+  @include prefixer(animation-play-state, $states, spec);
 }
 
 
 @mixin animation-delay ($times...) {
-  @include prefixer(animation-delay, $times, webkit moz spec);
+  @include prefixer(animation-delay, $times, spec);
 }
 
 
 @mixin animation-fill-mode ($modes...) {
 // none | forwards | backwards | both
-  @include prefixer(animation-fill-mode, $modes, webkit moz spec);
+  @include prefixer(animation-fill-mode, $modes, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_backface-visibility.scss b/common/static/sass/bourbon/css3/_backface-visibility.scss
index 1161fe60dd..2efcb038ab 100644
--- a/common/static/sass/bourbon/css3/_backface-visibility.scss
+++ b/common/static/sass/bourbon/css3/_backface-visibility.scss
@@ -2,5 +2,5 @@
 // Backface-visibility mixin
 //************************************************************************//
 @mixin backface-visibility($visibility) {
-  @include prefixer(backface-visibility, $visibility, webkit spec);
+  @include prefixer(backface-visibility, $visibility, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_background.scss b/common/static/sass/bourbon/css3/_background.scss
index 9bce9308bf..b3cd08e3f8 100644
--- a/common/static/sass/bourbon/css3/_background.scss
+++ b/common/static/sass/bourbon/css3/_background.scss
@@ -4,11 +4,9 @@
 //************************************************************************//
 
 @mixin background($backgrounds...) {
-  $webkit-backgrounds: ();
   $spec-backgrounds: ();
 
   @each $background in $backgrounds {
-    $webkit-background: ();
     $spec-background: ();
     $background-type: type-of($background);
 
@@ -19,37 +17,30 @@
       $gradient-type: str-slice($background-str, 0, 6);
 
       @if $url-str == "url" {
-        $webkit-background: $background;
           $spec-background: $background;
       }
 
       @else if $gradient-type == "linear" {
         $gradients: _linear-gradient-parser("#{$background}");
-        $webkit-background: map-get($gradients, webkit-image);
-        $spec-background:   map-get($gradients, spec-image);
+        $spec-background: map-get($gradients, spec-image);
       }
 
       @else if $gradient-type == "radial" {
         $gradients: _radial-gradient-parser("#{$background}");
-        $webkit-background: map-get($gradients, webkit-image);
-        $spec-background:   map-get($gradients, spec-image);
+        $spec-background: map-get($gradients, spec-image);
       }
 
       @else {
-        $webkit-background: $background;
           $spec-background: $background;
       }
     }
 
     @else {
-      $webkit-background: $background;
         $spec-background: $background;
     }
 
-    $webkit-backgrounds: append($webkit-backgrounds, $webkit-background, comma);
-    $spec-backgrounds:   append($spec-backgrounds,   $spec-background,   comma);
+    $spec-backgrounds: append($spec-backgrounds,   $spec-background,   comma);
   }
 
-  background: $webkit-backgrounds;
   background: $spec-backgrounds;
 }
diff --git a/common/static/sass/bourbon/css3/_box-sizing.scss b/common/static/sass/bourbon/css3/_box-sizing.scss
index f07e1d412e..0c2e4968e9 100644
--- a/common/static/sass/bourbon/css3/_box-sizing.scss
+++ b/common/static/sass/bourbon/css3/_box-sizing.scss
@@ -1,4 +1,4 @@
 @mixin box-sizing ($box) {
 //  content-box | border-box | inherit
-  @include prefixer(box-sizing, $box, webkit moz spec);
+  @include prefixer(box-sizing, $box, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_perspective.scss b/common/static/sass/bourbon/css3/_perspective.scss
index 0e4deb80f3..aa531c8c2d 100644
--- a/common/static/sass/bourbon/css3/_perspective.scss
+++ b/common/static/sass/bourbon/css3/_perspective.scss
@@ -1,8 +1,8 @@
 @mixin perspective($depth: none) {
   // none | <length>
-  @include prefixer(perspective, $depth, webkit moz spec);
+  @include prefixer(perspective, $depth, spec);
 }
 
 @mixin perspective-origin($value: 50% 50%) {
-  @include prefixer(perspective-origin, $value, webkit moz spec);
+  @include prefixer(perspective-origin, $value, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_radial-gradient.scss b/common/static/sass/bourbon/css3/_radial-gradient.scss
index 7a8c3765f1..0eee7a6078 100644
--- a/common/static/sass/bourbon/css3/_radial-gradient.scss
+++ b/common/static/sass/bourbon/css3/_radial-gradient.scss
@@ -34,6 +34,5 @@
   $shape-size-spec: if(($shape-size-spec != ' ') and ($pos == null), '#{$shape-size-spec}, ', '#{$shape-size-spec} ');
 
   background-color:  $fallback-color;
-  background-image: -webkit-radial-gradient(unquote(#{$pos}#{$shape-size}#{$full}));
   background-image: unquote("radial-gradient(#{$shape-size-spec}#{$pos-spec}#{$full})");
 }
diff --git a/common/static/sass/bourbon/css3/_transform.scss b/common/static/sass/bourbon/css3/_transform.scss
index 8cc35963d5..b92ed338b5 100644
--- a/common/static/sass/bourbon/css3/_transform.scss
+++ b/common/static/sass/bourbon/css3/_transform.scss
@@ -1,15 +1,15 @@
 @mixin transform($property: none) {
 //  none | <transform-function>
-  @include prefixer(transform, $property, webkit moz ms o spec);
+  @include prefixer(transform, $property, spec);
 }
 
 @mixin transform-origin($axes: 50%) {
 // x-axis - left | center | right  | length | %
 // y-axis - top  | center | bottom | length | %
 // z-axis -                          length
-  @include prefixer(transform-origin, $axes, webkit moz ms o spec);
+  @include prefixer(transform-origin, $axes, spec);
 }
 
 @mixin transform-style ($style: flat) {
-  @include prefixer(transform-style, $style, webkit moz ms o spec);
+  @include prefixer(transform-style, $style, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_transition.scss b/common/static/sass/bourbon/css3/_transition.scss
index 5ad4c0aed2..c97ea0e822 100644
--- a/common/static/sass/bourbon/css3/_transition.scss
+++ b/common/static/sass/bourbon/css3/_transition.scss
@@ -4,74 +4,29 @@
 //          @include transition-property (transform, opacity);
 
 @mixin transition ($properties...) {
-  // Fix for vendor-prefix transform property
-  $needs-prefixes: false;
-  $webkit: ();
-  $moz: ();
-  $spec: ();
-
-  // Create lists for vendor-prefixed transform
-  @each $list in $properties {
-    @if nth($list, 1) == "transform" {
-      $needs-prefixes: true;
-      $list1: -webkit-transform;
-      $list2: -moz-transform;
-      $list3: ();
-
-      @each $var in $list {
-        $list3: join($list3, $var);
-
-        @if $var != "transform" {
-          $list1: join($list1, $var);
-          $list2: join($list2, $var);
-        }
-      }
-
-      $webkit: append($webkit, $list1);
-         $moz: append($moz,    $list2);
-        $spec: append($spec,   $list3);
-    }
-
-    // Create lists for non-prefixed transition properties
-    @else {
-      $webkit:  append($webkit, $list, comma);
-      $moz:     append($moz,    $list, comma);
-      $spec:    append($spec,   $list, comma);
-    }
+  @if length($properties) >= 1 {
+    @include prefixer(transition, $properties, spec);
   }
 
-  @if $needs-prefixes {
-    -webkit-transition: $webkit;
-       -moz-transition: $moz;
-            transition: $spec;
-  }
   @else {
-    @if length($properties) >= 1 {
-      @include prefixer(transition, $properties, webkit moz spec);
-    }
-
-    @else {
-      $properties: all 0.15s ease-out 0s;
-      @include prefixer(transition, $properties, webkit moz spec);
-    }
+    $properties: all 0.15s ease-out 0s;
+     @include prefixer(transition, $properties, spec);
   }
 }
 
 @mixin transition-property ($properties...) {
-   -webkit-transition-property: transition-property-names($properties, 'webkit');
-      -moz-transition-property: transition-property-names($properties, 'moz');
-           transition-property: transition-property-names($properties, false);
+  transition-property: transition-property-names($properties, false);
 }
 
 @mixin transition-duration ($times...) {
-  @include prefixer(transition-duration, $times, webkit moz spec);
+  @include prefixer(transition-duration, $times, spec);
 }
 
 @mixin transition-timing-function ($motions...) {
 // ease | linear | ease-in | ease-out | ease-in-out | cubic-bezier()
-  @include prefixer(transition-timing-function, $motions, webkit moz spec);
+  @include prefixer(transition-timing-function, $motions, spec);
 }
 
 @mixin transition-delay ($times...) {
-  @include prefixer(transition-delay, $times, webkit moz spec);
+  @include prefixer(transition-delay, $times, spec);
 }
diff --git a/common/static/sass/bourbon/css3/_user-select.scss b/common/static/sass/bourbon/css3/_user-select.scss
index 1380aa8baa..f89fa5d552 100644
--- a/common/static/sass/bourbon/css3/_user-select.scss
+++ b/common/static/sass/bourbon/css3/_user-select.scss
@@ -1,3 +1,3 @@
 @mixin user-select($arg: none) {
-  @include prefixer(user-select, $arg, webkit moz ms spec);
+  @include prefixer(user-select, $arg, spec);
 }