           browsers: browsers
 
 feature flexbox, match: /y\sx/, (browsers) ->
-  prefix 'display-flex', 'inline-flex',
-          props:  ['display']
-          browsers: browsers
-  prefix 'flex', 'flex-grow', 'flex-shrink', 'flex-basis',
-          transition: true
-          browsers:   browsers
-  prefix 'flex-direction', 'flex-wrap', 'flex-flow', 'justify-content',
-         'order', 'align-items', 'align-self', 'align-content',
-          browsers: browsers
+  add 'display-flex', 'inline-flex',
+       browsers: browsers
+  add 'flex', 'flex-grow', 'flex-shrink', 'flex-basis',
+       browsers:   browsers
+  add 'flex-direction', 'flex-wrap', 'flex-flow', 'justify-content',
+      'order', 'align-items', 'align-self', 'align-content',
+       browsers: browsers
 
 # calc() unit
 feature require('caniuse-db/features-json/calc'), (browsers) ->

          mistakes: ['-ms-']
          browsers: browsers

# Box sizing
feature require('caniuse-db/features-json/css3-boxsizing'), (browsers) ->
  prefix 'box-sizing',

          browsers: browsers

# Gradients
gradients = require('caniuse-db/features-json/css-gradients')

feature gradients, match: /y\sx/, (browsers) ->
  prefix 'linear-gradient', 'repeating-linear-gradient',
         'radial-gradient', 'repeating-radial-gradient',
          props:    ['background', 'background-image', 'border-image',
