diff --git a/app/assets/javascripts/discourse/views/post-menu.js.es6 b/app/assets/javascripts/discourse/views/post-menu.js.es6
index bc7e8b51a79..c1d86e79a4a 100644
--- a/app/assets/javascripts/discourse/views/post-menu.js.es6
+++ b/app/assets/javascripts/discourse/views/post-menu.js.es6
@@ -19,7 +19,7 @@ function animateHeart($elem, start, end, complete) {
        .animate({ textIndent: end }, {
           complete: complete,
           step: function(now) {
-            $(this).css('-webkit-transform','scale('+now+')');
+            $(this).css('transform','scale('+now+')');
           },
           duration: 150
         }, 'linear');
diff --git a/app/assets/stylesheets/common/base/discourse.scss b/app/assets/stylesheets/common/base/discourse.scss
index c7659f0218b..e869bcd1cea 100644
--- a/app/assets/stylesheets/common/base/discourse.scss
+++ b/app/assets/stylesheets/common/base/discourse.scss
@@ -182,15 +182,6 @@ body {
 }
 
 
-@-webkit-keyframes rotate-forever {
-  0% {
-    -webkit-transform: rotate(0deg);
-  }
-  100% {
-    -webkit-transform: rotate(360deg);
-  }
-}
-
 @keyframes rotate-forever {
   0% {
     transform: rotate(0deg);
diff --git a/app/assets/stylesheets/common/base/magnific-popup.scss b/app/assets/stylesheets/common/base/magnific-popup.scss
index a0c98d3051c..18837345cdb 100644
--- a/app/assets/stylesheets/common/base/magnific-popup.scss
+++ b/app/assets/stylesheets/common/base/magnific-popup.scss
@@ -599,15 +599,12 @@ button {
 // Scale navigation arrows and reduce padding from sides
 @media all and (max-width: 900px) {
   .mfp-arrow {
-    -webkit-transform: scale(0.75);
     transform: scale(0.75);
   }
   .mfp-arrow-left {
-    -webkit-transform-origin: 0;
     transform-origin: 0;
   }
   .mfp-arrow-right {
-    -webkit-transform-origin: 100%;
     transform-origin: 100%;
   }
   .mfp-container {
diff --git a/app/assets/stylesheets/common/base/modal.scss b/app/assets/stylesheets/common/base/modal.scss
index f3c9178b8ee..3cae71690b2 100644
--- a/app/assets/stylesheets/common/base/modal.scss
+++ b/app/assets/stylesheets/common/base/modal.scss
@@ -34,9 +34,6 @@
 
 //fade in
 
-@-webkit-keyframes fade {
-    from {opacity: 0}
-    to {opacity: .8}
 }@keyframes fade {
     from {opacity: 0}
     to {opacity: .8}
diff --git a/app/assets/stylesheets/desktop/modal.scss b/app/assets/stylesheets/desktop/modal.scss
index 59cdbd74f48..dba91df4dd6 100644
--- a/app/assets/stylesheets/desktop/modal.scss
+++ b/app/assets/stylesheets/desktop/modal.scss
@@ -31,9 +31,6 @@ animation: modal .25s;
 
 //fade in and animate up
 
-@-webkit-keyframes modal {
-    from {opacity: 0}
-    to {opacity: 1}
 }@keyframes fade {
     from {opacity: 0}
     to {opacity: 1}
diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index a2107338c52..fef95418de4 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -514,10 +514,6 @@ video {
     from {opacity: 0;}
     to {opacity: 1;}
 }
-@-webkit-keyframes fadein {
-    from {opacity: 0;}
-    to {opacity: 1;}
-}
 
 .extra-info-wrapper {
   overflow: hidden;
diff --git a/app/assets/stylesheets/vendor/font_awesome/_mixins.scss b/app/assets/stylesheets/vendor/font_awesome/_mixins.scss
index 9f555963f83..e7b9cbd1ae4 100644
--- a/app/assets/stylesheets/vendor/font_awesome/_mixins.scss
+++ b/app/assets/stylesheets/vendor/font_awesome/_mixins.scss
@@ -2,19 +2,9 @@
 // --------------------------
 
 @mixin fa-icon-rotate($degrees, $rotation) {
-  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
-  -webkit-transform: rotate($degrees);
-     -moz-transform: rotate($degrees);
-      -ms-transform: rotate($degrees);
-       -o-transform: rotate($degrees);
           transform: rotate($degrees);
 }
 
 @mixin fa-icon-flip($horiz, $vert, $rotation) {
-  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
-  -webkit-transform: scale($horiz, $vert);
-     -moz-transform: scale($horiz, $vert);
-      -ms-transform: scale($horiz, $vert);
-       -o-transform: scale($horiz, $vert);
           transform: scale($horiz, $vert);
 }
diff --git a/app/assets/stylesheets/vendor/font_awesome/_spinning.scss b/app/assets/stylesheets/vendor/font_awesome/_spinning.scss
index ba1e4f16236..c352dc4f2c5 100644
--- a/app/assets/stylesheets/vendor/font_awesome/_spinning.scss
+++ b/app/assets/stylesheets/vendor/font_awesome/_spinning.scss
@@ -2,28 +2,9 @@
 // --------------------------
 
 .#{$fa-css-prefix}-spin {
-  -webkit-animation: spin 2s infinite linear;
-  -moz-animation: spin 2s infinite linear;
-  -o-animation: spin 2s infinite linear;
   animation: spin 2s infinite linear;
 }
 
-@-moz-keyframes spin {
-  0% { -moz-transform: rotate(0deg); }
-  100% { -moz-transform: rotate(359deg); }
-}
-@-webkit-keyframes spin {
-  0% { -webkit-transform: rotate(0deg); }
-  100% { -webkit-transform: rotate(359deg); }
-}
-@-o-keyframes spin {
-  0% { -o-transform: rotate(0deg); }
-  100% { -o-transform: rotate(359deg); }
-}
-@-ms-keyframes spin {
-  0% { -ms-transform: rotate(0deg); }
-  100% { -ms-transform: rotate(359deg); }
-}
 @keyframes spin {
   0% { transform: rotate(0deg); }
   100% { transform: rotate(359deg); }