diff --git a/docs/api.md b/docs/api.md
index 95176e466f7..24631e17c19 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -29,7 +29,7 @@
   * [page.addScriptTag(url)](#pageaddscripttagurl)
   * [page.click(selector)](#pageclickselector)
   * [page.close()](#pageclose)
-  * [page.emulate(name, options)](#pageemulatename-options)
+  * [page.emulate(name)](#pageemulatename)
   * [page.emulatedDevices()](#pageemulateddevices)
   * [page.evaluate(pageFunction, ...args)](#pageevaluatepagefunction-args)
   * [page.evaluateOnInitialized(pageFunction, ...args)](#pageevaluateoninitializedpagefunction-args)
@@ -316,10 +316,8 @@ Adds a `<script></script>` tag to the page with the desired url. Alternatively,
 #### page.close()
 - returns: <[Promise]> Returns promise which resolves when page gets closed.
 
-#### page.emulate(name, options)
+#### page.emulate(name)
 - `name` <[string]> A name of the device to be emulated. Get the full list of emulated devices via `page.emulatedDevices()`.
-- `options` <[Object]> Emulation parameters which might have the following properties:
-  - `landscape` <[boolean]> Emulates device in the landscape mode, defaults to `false`.
 - returns: <[Promise]> Returns promise which resolves when device is emulated. Can reload the page if switching between mobile and desktop devices.
 
 #### page.emulatedDevices()
diff --git a/lib/DeviceDescriptors.js b/lib/DeviceDescriptors.js
index f39da5f6fea..d9f6934d33c 100644
--- a/lib/DeviceDescriptors.js
+++ b/lib/DeviceDescriptors.js
@@ -14,1136 +14,619 @@
  * limitations under the License.
  */
 
-module.exports =
-[
+module.exports = [
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'iPhone 4' ,
-      'screen': {
-        'horizontal': {
-          'width': 480,
-          'height': 320
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 320,
-          'height': 480
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Blackberry PlayBook',
+    'userAgent': 'Mozilla/5.0 (PlayBook; U; RIM Tablet OS 2.1.0; en-US) AppleWebKit/536.2+ (KHTML like Gecko) Version/7.2.1.0 Safari/536.2+',
+    'viewport': {
+      'width': 600,
+      'height': 1024,
+      'deviceScaleFactor': 1,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 40,
-    'device': {
-      'show-by-default': true,
-      'title': 'iPhone 5',
-      'screen': {
-        'horizontal': {
-          'outline' : {
-            'image': '@url(iPhone5-landscape.svg)',
-            'insets' : { 'left': 115, 'top': 25, 'right': 115, 'bottom': 28 }
-          },
-          'width': 568,
-          'height': 320
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'outline' : {
-            'image': '@url(iPhone5-portrait.svg)',
-            'insets' : { 'left': 29, 'top': 105, 'right': 25, 'bottom': 111 }
-          },
-          'width': 320,
-          'height': 568
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Blackberry PlayBook landscape',
+    'userAgent': 'Mozilla/5.0 (PlayBook; U; RIM Tablet OS 2.1.0; en-US) AppleWebKit/536.2+ (KHTML like Gecko) Version/7.2.1.0 Safari/536.2+',
+    'viewport': {
+      'width': 1024,
+      'height': 600,
+      'deviceScaleFactor': 1,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 50,
-    'device': {
-      'show-by-default': true,
-      'title': 'iPhone 6',
-      'screen': {
-        'horizontal': {
-          'outline' : {
-            'image': '@url(iPhone6-landscape.svg)',
-            'insets' : { 'left': 106, 'top': 28, 'right': 106, 'bottom': 28 }
-          },
-          'width': 667,
-          'height': 375
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'outline' : {
-            'image': '@url(iPhone6-portrait.svg)',
-            'insets' : { 'left': 28, 'top': 105, 'right': 28, 'bottom': 105 }
-          },
-          'width': 375,
-          'height': 667
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'BlackBerry Z30',
+    'userAgent': 'Mozilla/5.0 (BB10; Touch) AppleWebKit/537.10+ (KHTML, like Gecko) Version/10.0.9.2372 Mobile Safari/537.10+',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 60,
-    'device': {
-      'show-by-default': true,
-      'title': 'iPhone 6 Plus',
-      'screen': {
-        'horizontal': {
-          'outline' : {
-            'image': '@url(iPhone6Plus-landscape.svg)',
-            'insets' : { 'left': 109, 'top': 29, 'right': 109, 'bottom': 27 }
-          },
-          'width': 736,
-          'height': 414
-        },
-        'device-pixel-ratio': 3,
-        'vertical': {
-          'outline' : {
-            'image': '@url(iPhone6Plus-portrait.svg)',
-            'insets' : { 'left': 26, 'top': 107, 'right': 30, 'bottom': 111 }
-          },
-          'width': 414,
-          'height': 736
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'BlackBerry Z30 landscape',
+    'userAgent': 'Mozilla/5.0 (BB10; Touch) AppleWebKit/537.10+ (KHTML, like Gecko) Version/10.0.9.2372 Mobile Safari/537.10+',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'BlackBerry Z30',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (BB10; Touch) AppleWebKit/537.10+ (KHTML, like Gecko) Version/10.0.9.2372 Mobile Safari/537.10+',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy Note 3',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nexus 4',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 384
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 384,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 4.4.2; Nexus 4 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy Note 3 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'title': 'Nexus 5',
-      'type': 'phone',
-      'user-agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'show-by-default': false,
-      'screen': {
-        'device-pixel-ratio': 3,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        },
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        }
-      },
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 25, 'right': 0, 'bottom': 48 },
-          'image': '@url(google-nexus-5-vertical-default-1x.png) 1x, @url(google-nexus-5-vertical-default-2x.png) 2x'
-        },
-        {
-          'title': 'navigation bar',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 80, 'right': 0, 'bottom': 48 },
-          'image': '@url(google-nexus-5-vertical-navigation-1x.png) 1x, @url(google-nexus-5-vertical-navigation-2x.png) 2x'
-        },
-        {
-          'title': 'keyboard',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 80, 'right': 0, 'bottom': 312 },
-          'image': '@url(google-nexus-5-vertical-keyboard-1x.png) 1x, @url(google-nexus-5-vertical-keyboard-2x.png) 2x'
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 25, 'right': 42, 'bottom': 0 },
-          'image': '@url(google-nexus-5-horizontal-default-1x.png) 1x, @url(google-nexus-5-horizontal-default-2x.png) 2x'
-        },
-        {
-          'title': 'navigation bar',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 80, 'right': 42, 'bottom': 0 },
-          'image': '@url(google-nexus-5-horizontal-navigation-1x.png) 1x, @url(google-nexus-5-horizontal-navigation-2x.png) 2x'
-        },
-        {
-          'title': 'keyboard',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 80, 'right': 42, 'bottom': 202 },
-          'image': '@url(google-nexus-5-horizontal-keyboard-1x.png) 1x, @url(google-nexus-5-horizontal-keyboard-2x.png) 2x'
-        }
-      ]
+    'name': 'Galaxy Note II',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.1; en-us; GT-N7100 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 20,
-    'device': {
-      'title': 'Nexus 5X',
-      'type': 'phone',
-      'user-agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'show-by-default': true,
-      'screen': {
-        'device-pixel-ratio': 2.625,
-        'vertical': {
-          'outline' : {
-            'image': '@url(Nexus5X-portrait.svg)',
-            'insets' : { 'left': 18, 'top': 88, 'right': 22, 'bottom': 98 }
-          },
-          'width': 412,
-          'height': 732
-        },
-        'horizontal': {
-          'outline' : {
-            'image': '@url(Nexus5X-landscape.svg)',
-            'insets' : { 'left': 88, 'top': 21, 'right': 98, 'bottom': 19 }
-          },
-          'width': 732,
-          'height': 412
-        }
-      },
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 24, 'right': 0, 'bottom': 48 },
-          'image': '@url(google-nexus-5x-vertical-default-1x.png) 1x, @url(google-nexus-5x-vertical-default-2x.png) 2x'
-        },
-        {
-          'title': 'navigation bar',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 80, 'right': 0, 'bottom': 48 },
-          'image': '@url(google-nexus-5x-vertical-navigation-1x.png) 1x, @url(google-nexus-5x-vertical-navigation-2x.png) 2x'
-        },
-        {
-          'title': 'keyboard',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 80, 'right': 0, 'bottom': 342 },
-          'image': '@url(google-nexus-5x-vertical-keyboard-1x.png) 1x, @url(google-nexus-5x-vertical-keyboard-2x.png) 2x'
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 24, 'right': 48, 'bottom': 0 },
-          'image': '@url(google-nexus-5x-horizontal-default-1x.png) 1x, @url(google-nexus-5x-horizontal-default-2x.png) 2x'
-        },
-        {
-          'title': 'navigation bar',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 80, 'right': 48, 'bottom': 0 },
-          'image': '@url(google-nexus-5x-horizontal-navigation-1x.png) 1x, @url(google-nexus-5x-horizontal-navigation-2x.png) 2x'
-        },
-        {
-          'title': 'keyboard',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 80, 'right': 48, 'bottom': 222 },
-          'image': '@url(google-nexus-5x-horizontal-keyboard-1x.png) 1x, @url(google-nexus-5x-horizontal-keyboard-2x.png) 2x'
-        }
-      ]
+    'name': 'Galaxy Note II landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.1; en-us; GT-N7100 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nexus 6',
-      'screen': {
-        'horizontal': {
-          'width': 732,
-          'height': 412
-        },
-        'device-pixel-ratio': 3.5,
-        'vertical': {
-          'width': 412,
-          'height': 732
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy S III',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.0; en-us; GT-I9300 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 30,
-    'device': {
-      'show-by-default': true,
-      'title': 'Nexus 6P',
-      'screen': {
-        'horizontal': {
-          'outline' : {
-            'image': '@url(Nexus6P-landscape.svg)',
-            'insets' : { 'left': 94, 'top': 17, 'right': 88, 'bottom': 17 }
-          },
-          'width': 732,
-          'height': 412
-        },
-        'device-pixel-ratio': 3.5,
-        'vertical': {
-          'outline' : {
-            'image': '@url(Nexus6P-portrait.svg)',
-            'insets' : { 'left': 16, 'top': 94, 'right': 16, 'bottom': 88 }
-          },
-          'width': 412,
-          'height': 732
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy S III landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.0; en-us; GT-I9300 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'LG Optimus L70',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 384
-        },
-        'device-pixel-ratio': 1.25,
-        'vertical': {
-          'width': 384,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; U; Android 4.4.2; en-us; LGMS323 Build/KOT49I.MS32310c) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy S5',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nokia N9',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 1,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Galaxy S5 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nokia Lumia 520',
-      'screen': {
-        'horizontal': {
-          'width': 533,
-          'height': 320
-        },
-        'device-pixel-ratio': 1.5,
-        'vertical': {
-          'width': 320,
-          'height': 533
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IEMobile/10.0; ARM; Touch; NOKIA; Lumia 520)',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 768,
+      'height': 1024,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Microsoft Lumia 550',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 640,
-          'height': 360
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Windows Phone 10.0; Android 4.2.1; Microsoft; Lumia 550) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Mobile Safari/537.36 Edge/14.14263',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad landscape',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 1024,
+      'height': 768,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Microsoft Lumia 950',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 4,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Windows Phone 10.0; Android 4.2.1; Microsoft; Lumia 950) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Mobile Safari/537.36 Edge/14.14263',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad Mini',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 768,
+      'height': 1024,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Galaxy S III',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; U; Android 4.0; en-us; GT-I9300 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad Mini landscape',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 1024,
+      'height': 768,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 10,
-    'device': {
-      'show-by-default': true,
-      'title': 'Galaxy S5',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 3,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Mobile Safari/537.36',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad Pro',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 1024,
+      'height': 1366,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Kindle Fire HDX',
-      'screen': {
-        'horizontal': {
-          'width': 2560,
-          'height': 1600
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 1600,
-          'height': 2560
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; U; en-us; KFAPWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Safari/535.19 Silk-Accelerated=true',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPad Pro landscape',
+    'userAgent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 1366,
+      'height': 1024,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'iPad Mini',
-      'screen': {
-        'horizontal': {
-          'width': 1024,
-          'height': 768
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 768,
-          'height': 1024
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 4',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 320,
+      'height': 480,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 70,
-    'device': {
-      'show-by-default': true,
-      'title': 'iPad',
-      'screen': {
-        'horizontal': {
-          'outline' : {
-            'image': '@url(iPad-landscape.svg)',
-            'insets' : { 'left': 112, 'top': 56, 'right': 116, 'bottom': 52 }
-          },
-          'width': 1024,
-          'height': 768
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'outline' : {
-            'image': '@url(iPad-portrait.svg)',
-            'insets' : { 'left': 52, 'top': 114, 'right': 55, 'bottom': 114 }
-          },
-          'width': 768,
-          'height': 1024
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 4 landscape',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 480,
+      'height': 320,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'order': 80,
-    'device': {
-      'show-by-default': true,
-      'title': 'iPad Pro',
-      'screen': {
-        'horizontal': {
-          'width': 1366,
-          'height': 1024
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 1024,
-          'height': 1366
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 5',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 320,
+      'height': 568,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Blackberry PlayBook',
-      'screen': {
-        'horizontal': {
-          'width': 1024,
-          'height': 600
-        },
-        'device-pixel-ratio': 1,
-        'vertical': {
-          'width': 600,
-          'height': 1024
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (PlayBook; U; RIM Tablet OS 2.1.0; en-US) AppleWebKit/536.2+ (KHTML like Gecko) Version/7.2.1.0 Safari/536.2+',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 5 landscape',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 568,
+      'height': 320,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nexus 10',
-      'screen': {
-        'horizontal': {
-          'width': 1280,
-          'height': 800
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 800,
-          'height': 1280
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 10 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Safari/537.36',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 6',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 375,
+      'height': 667,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Nexus 7',
-      'screen': {
-        'horizontal': {
-          'width': 960,
-          'height': 600
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 600,
-          'height': 960
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 7 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Safari/537.36',
-      'type': 'tablet',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 6 landscape',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 667,
+      'height': 375,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Galaxy Note 3',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 3,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 6 Plus',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 414,
+      'height': 736,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Galaxy Note II',
-      'screen': {
-        'horizontal': {
-          'width': 640,
-          'height': 360
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 360,
-          'height': 640
-        }
-      },
-      'capabilities': [
-        'touch',
-        'mobile'
-      ],
-      'user-agent': 'Mozilla/5.0 (Linux; U; Android 4.1; en-us; GT-N7100 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30',
-      'type': 'phone',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'vertical',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        },
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'iPhone 6 Plus landscape',
+    'userAgent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
+    'viewport': {
+      'width': 736,
+      'height': 414,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Laptop with touch',
-      'screen': {
-        'horizontal': {
-          'width': 1280,
-          'height': 950
-        },
-        'device-pixel-ratio': 1,
-        'vertical': {
-          'width': 950,
-          'height': 1280
-        }
-      },
-      'capabilities': [
-        'touch'
-      ],
-      'user-agent': '',
-      'type': 'notebook',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Kindle Fire HDX',
+    'userAgent': 'Mozilla/5.0 (Linux; U; en-us; KFAPWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Safari/535.19 Silk-Accelerated=true',
+    'viewport': {
+      'width': 800,
+      'height': 1280,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Laptop with HiDPI screen',
-      'screen': {
-        'horizontal': {
-          'width': 1440,
-          'height': 900
-        },
-        'device-pixel-ratio': 2,
-        'vertical': {
-          'width': 900,
-          'height': 1440
-        }
-      },
-      'capabilities': [],
-      'user-agent': '',
-      'type': 'notebook',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'Kindle Fire HDX landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; U; en-us; KFAPWI Build/JDQ39) AppleWebKit/535.19 (KHTML, like Gecko) Silk/3.13 Safari/535.19 Silk-Accelerated=true',
+    'viewport': {
+      'width': 1280,
+      'height': 800,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   },
   {
-    'type': 'emulated-device',
-    'device': {
-      'show-by-default': false,
-      'title': 'Laptop with MDPI screen',
-      'screen': {
-        'horizontal': {
-          'width': 1280,
-          'height': 800
-        },
-        'device-pixel-ratio': 1,
-        'vertical': {
-          'width': 800,
-          'height': 1280
-        }
-      },
-      'capabilities': [],
-      'user-agent': '',
-      'type': 'notebook',
-      'modes': [
-        {
-          'title': 'default',
-          'orientation': 'horizontal',
-          'insets': { 'left': 0, 'top': 0, 'right': 0, 'bottom': 0 }
-        }
-      ]
+    'name': 'LG Optimus L70',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.4.2; en-us; LGMS323 Build/KOT49I.MS32310c) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 384,
+      'height': 640,
+      'deviceScaleFactor': 1.25,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'LG Optimus L70 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; U; Android 4.4.2; en-us; LGMS323 Build/KOT49I.MS32310c) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 640,
+      'height': 384,
+      'deviceScaleFactor': 1.25,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Microsoft Lumia 550',
+    'userAgent': 'Mozilla/5.0 (Windows Phone 10.0; Android 4.2.1; Microsoft; Lumia 550) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Mobile Safari/537.36 Edge/14.14263',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Microsoft Lumia 950',
+    'userAgent': 'Mozilla/5.0 (Windows Phone 10.0; Android 4.2.1; Microsoft; Lumia 950) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Mobile Safari/537.36 Edge/14.14263',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 4,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Microsoft Lumia 950 landscape',
+    'userAgent': 'Mozilla/5.0 (Windows Phone 10.0; Android 4.2.1; Microsoft; Lumia 950) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Mobile Safari/537.36 Edge/14.14263',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 4,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 10',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 10 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36',
+    'viewport': {
+      'width': 800,
+      'height': 1280,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 10 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 10 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36',
+    'viewport': {
+      'width': 1280,
+      'height': 800,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 4',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.4.2; Nexus 4 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 384,
+      'height': 640,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 4 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.4.2; Nexus 4 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 640,
+      'height': 384,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 5',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 360,
+      'height': 640,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 5 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 640,
+      'height': 360,
+      'deviceScaleFactor': 3,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 5X',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 412,
+      'height': 732,
+      'deviceScaleFactor': 2.625,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 5X landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 732,
+      'height': 412,
+      'deviceScaleFactor': 2.625,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 6',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 412,
+      'height': 732,
+      'deviceScaleFactor': 3.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 6 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 732,
+      'height': 412,
+      'deviceScaleFactor': 3.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 6P',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 412,
+      'height': 732,
+      'deviceScaleFactor': 3.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 6P landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Mobile Safari/537.36',
+    'viewport': {
+      'width': 732,
+      'height': 412,
+      'deviceScaleFactor': 3.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nexus 7',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 7 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36',
+    'viewport': {
+      'width': 600,
+      'height': 960,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nexus 7 landscape',
+    'userAgent': 'Mozilla/5.0 (Linux; Android 4.3; Nexus 7 Build/JSS15Q) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36',
+    'viewport': {
+      'width': 960,
+      'height': 600,
+      'deviceScaleFactor': 2,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nokia Lumia 520',
+    'userAgent': 'Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IEMobile/10.0; ARM; Touch; NOKIA; Lumia 520)',
+    'viewport': {
+      'width': 320,
+      'height': 533,
+      'deviceScaleFactor': 1.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nokia Lumia 520 landscape',
+    'userAgent': 'Mozilla/5.0 (compatible; MSIE 10.0; Windows Phone 8.0; Trident/6.0; IEMobile/10.0; ARM; Touch; NOKIA; Lumia 520)',
+    'viewport': {
+      'width': 533,
+      'height': 320,
+      'deviceScaleFactor': 1.5,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
+    }
+  },
+  {
+    'name': 'Nokia N9',
+    'userAgent': 'Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13',
+    'viewport': {
+      'width': 480,
+      'height': 854,
+      'deviceScaleFactor': 1,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': false
+    }
+  },
+  {
+    'name': 'Nokia N9 landscape',
+    'userAgent': 'Mozilla/5.0 (MeeGo; NokiaN9) AppleWebKit/534.13 (KHTML, like Gecko) NokiaBrowser/8.5.0 Mobile Safari/534.13',
+    'viewport': {
+      'width': 854,
+      'height': 480,
+      'deviceScaleFactor': 1,
+      'isMobile': true,
+      'hasTouch': true,
+      'isLandscape': true
     }
   }
 ];
+for (let device of module.exports)
+  module.exports[device.name] = device;
diff --git a/lib/EmulationManager.js b/lib/EmulationManager.js
index 85425ad617f..ce78c41664b 100644
--- a/lib/EmulationManager.js
+++ b/lib/EmulationManager.js
@@ -21,7 +21,7 @@ class EmulationManager {
    * @return {!Promise<!Array<string>>}
    */
   static deviceNames() {
-    return Promise.resolve(DeviceDescriptors.map(entry => entry['device'].title));
+    return Promise.resolve(DeviceDescriptors.map(device => device.name));
   }
 
   /**
@@ -29,31 +29,20 @@ class EmulationManager {
    * @param {!Object=} options
    * @return {!Page.Viewport}
    */
-  static deviceViewport(name, options) {
-    options = options || {};
-    const descriptor = DeviceDescriptors.find(entry => entry['device'].title === name)['device'];
-    if (!descriptor)
+  static deviceViewport(name) {
+    const device = DeviceDescriptors.find(device => device.name === name);
+    if (!device)
       throw new Error(`Unable to emulate ${name}, no such device metrics in the library.`);
-    const device = EmulationManager.loadFromJSONV1(descriptor);
-    const viewport = options.landscape ? device.horizontal : device.vertical;
-    return {
-      width: viewport.width,
-      height: viewport.height,
-      deviceScaleFactor: device.deviceScaleFactor,
-      isMobile: device.capabilities.includes('mobile'),
-      hasTouch: device.capabilities.includes('touch'),
-      isLandscape: options.landscape || false
-    };
+    return device.viewport;
   }
 
   /**
    * @param {string} name
    */
-  static deviceUserAgent(name, options) {
-    const descriptor = DeviceDescriptors.find(entry => entry['device'].title === name)['device'];
-    if (!descriptor)
+  static deviceUserAgent(name) {
+    const device = DeviceDescriptors.find(device => device.name === name);
+    if (!device)
       throw new Error(`Unable to emulate ${name}, no such device metrics in the library.`);
-    const device = EmulationManager.loadFromJSONV1(descriptor);
     return device.userAgent;
   }
 
@@ -110,86 +99,6 @@ class EmulationManager {
     }
     return reloadNeeded;
   }
-
-  /**
-   * @param {*} json
-   * @return {?Object}
-   */
-  static loadFromJSONV1(json) {
-    /**
-     * @param {*} object
-     * @param {string} key
-     * @param {string} type
-     * @param {*=} defaultValue
-     * @return {*}
-     */
-    function parseValue(object, key, type, defaultValue) {
-      if (typeof object !== 'object' || object === null || !object.hasOwnProperty(key)) {
-        if (typeof defaultValue !== 'undefined')
-          return defaultValue;
-        throw new Error('Emulated device is missing required property \'' + key + '\'');
-      }
-      const value = object[key];
-      if (typeof value !== type || value === null)
-        throw new Error('Emulated device property \'' + key + '\' has wrong type \'' + typeof value + '\'');
-      return value;
-    }
-
-    /**
-     * @param {*} object
-     * @param {string} key
-     * @return {number}
-     */
-    function parseIntValue(object, key) {
-      const value = /** @type {number} */ (parseValue(object, key, 'number'));
-      if (value !== Math.abs(value))
-        throw new Error('Emulated device value \'' + key + '\' must be integer');
-      return value;
-    }
-
-    /**
-     * @param {*} json
-     * @return {!{width: number, height: number}}
-     */
-    function parseOrientation(json) {
-      const result = {};
-      const minDeviceSize = 50;
-      const maxDeviceSize = 9999;
-      result.width = parseIntValue(json, 'width');
-      if (result.width < 0 || result.width > maxDeviceSize ||
-          result.width < minDeviceSize)
-        throw new Error('Emulated device has wrong width: ' + result.width);
-
-      result.height = parseIntValue(json, 'height');
-      if (result.height < 0 || result.height > maxDeviceSize ||
-          result.height < minDeviceSize)
-        throw new Error('Emulated device has wrong height: ' + result.height);
-
-      return /** @type {!{width: number, height: number}} */ (result);
-    }
-
-    const result = {};
-    result.type = /** @type {string} */ (parseValue(json, 'type', 'string'));
-    result.userAgent = /** @type {string} */ (parseValue(json, 'user-agent', 'string'));
-
-    const capabilities = parseValue(json, 'capabilities', 'object', []);
-    if (!Array.isArray(capabilities))
-      throw new Error('Emulated device capabilities must be an array');
-    result.capabilities = [];
-    for (let i = 0; i < capabilities.length; ++i) {
-      if (typeof capabilities[i] !== 'string')
-        throw new Error('Emulated device capability must be a string');
-      result.capabilities.push(capabilities[i]);
-    }
-
-    result.deviceScaleFactor = /** @type {number} */ (parseValue(json['screen'], 'device-pixel-ratio', 'number'));
-    if (result.deviceScaleFactor < 0 || result.deviceScaleFactor > 100)
-      throw new Error('Emulated device has wrong deviceScaleFactor: ' + result.deviceScaleFactor);
-
-    result.vertical = parseOrientation(parseValue(json['screen'], 'vertical', 'object'));
-    result.horizontal = parseOrientation(parseValue(json['screen'], 'horizontal', 'object'));
-    return result;
-  }
 }
 
 EmulationManager._touchScriptId = Symbol('emulatingTouchScriptId');
diff --git a/lib/Page.js b/lib/Page.js
index 88091bffedb..630c9268736 100644
--- a/lib/Page.js
+++ b/lib/Page.js
@@ -358,13 +358,12 @@ class Page extends EventEmitter {
 
   /**
    * @param {string} name
-   * @param {!Object=} options
    * @return {!Promise}
    */
-  emulate(name, options) {
+  emulate(name) {
     return Promise.all([
       this.setUserAgent(EmulationManager.deviceUserAgent(name)),
-      this.setViewport(EmulationManager.deviceViewport(name, options))
+      this.setViewport(EmulationManager.deviceViewport(name))
     ]);
   }
 
diff --git a/utils/fetch_devices.js b/utils/fetch_devices.js
new file mode 100755
index 00000000000..5f102589387
--- /dev/null
+++ b/utils/fetch_devices.js
@@ -0,0 +1,224 @@
+#!/usr/bin/env node
+/**
+ * Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const util = require('util');
+const fs = require('fs');
+const path = require('path');
+const DEVICES_URL = 'https://raw.githubusercontent.com/ChromeDevTools/devtools-frontend/master/front_end/emulated_devices/module.json';
+
+const template = `/**
+ * Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = %s;
+for (let device of module.exports)
+  module.exports[device.name] = device;
+`;
+
+const help = `Usage:  node ${path.basename(__filename)} [-u <from>] <outputPath>
+  -u, --url    The URL to load devices descriptor from. If not set,
+               devices will be fetched from the tip-of-tree of DevTools
+               frontend.
+
+  -h, --help   Show this help message
+
+Fetch Chrome DevTools front-end emulation devices from given URL, convert them to puppeteer
+devices and save to the <outputPath>.
+`;
+
+let argv = require('minimist')(process.argv.slice(2), {
+  alias: { u: 'url', h: 'help' },
+});
+
+if (argv.help) {
+  console.log(help);
+  return;
+}
+
+let url = argv.url || DEVICES_URL;
+let outputPath = argv._[0];
+if (!outputPath) {
+  console.log('ERROR: output file name is missing. Use --help for help.');
+  return;
+}
+
+main(url);
+
+async function main(url) {
+  console.log('GET ' + url);
+  let text = await httpGET(url);
+  let json = null;
+  try {
+    json = JSON.parse(text);
+  } catch (e) {
+    console.error(`FAILED: error parsing response - ${e.message}`);
+    return;
+  }
+  let devicePayloads = json.extensions.filter(extension => extension.type === 'emulated-device').map(extension => extension.device);
+  let devices = [];
+  for (let payload of devicePayloads) {
+    let device = createDevice(payload, false);
+    let landscape = createDevice(payload, true);
+    devices.push(device);
+    if (landscape.viewport.width !== device.viewport.width || landscape.viewport.height !== device.viewport.height)
+      devices.push(landscape);
+  }
+  devices = devices.filter(device => device.viewport.isMobile);
+  devices.sort((a, b) => a.name.localeCompare(b.name));
+  // Use single-quotes instead of double-quotes to conform with codestyle.
+  let serialized = JSON.stringify(devices, null, 2)
+      .replace(/'/g, `\\'`)
+      .replace(/"/g, `'`);
+  let result = util.format(template, serialized);
+  fs.writeFileSync(outputPath, result, 'utf8');
+}
+
+/**
+ * @param {*} descriptor
+ * @param {boolean} landscape
+ * @return {!Object}
+ */
+function createDevice(descriptor, landscape) {
+  const devicePayload = loadFromJSONV1(descriptor);
+  const viewportPayload = landscape ? devicePayload.horizontal : devicePayload.vertical;
+  return {
+    name: descriptor.title + (landscape ? ' landscape' : ''),
+    userAgent: devicePayload.userAgent,
+    viewport: {
+      width: viewportPayload.width,
+      height: viewportPayload.height,
+      deviceScaleFactor: devicePayload.deviceScaleFactor,
+      isMobile: devicePayload.capabilities.includes('mobile'),
+      hasTouch: devicePayload.capabilities.includes('touch'),
+      isLandscape: landscape || false
+    }
+  };
+}
+
+/**
+ * @param {*} json
+ * @return {?Object}
+ */
+function loadFromJSONV1(json) {
+  /**
+   * @param {*} object
+   * @param {string} key
+   * @param {string} type
+   * @param {*=} defaultValue
+   * @return {*}
+   */
+  function parseValue(object, key, type, defaultValue) {
+    if (typeof object !== 'object' || object === null || !object.hasOwnProperty(key)) {
+      if (typeof defaultValue !== 'undefined')
+        return defaultValue;
+      throw new Error('Emulated device is missing required property \'' + key + '\'');
+    }
+    const value = object[key];
+    if (typeof value !== type || value === null)
+      throw new Error('Emulated device property \'' + key + '\' has wrong type \'' + typeof value + '\'');
+    return value;
+  }
+
+  /**
+   * @param {*} object
+   * @param {string} key
+   * @return {number}
+   */
+  function parseIntValue(object, key) {
+    const value = /** @type {number} */ (parseValue(object, key, 'number'));
+    if (value !== Math.abs(value))
+      throw new Error('Emulated device value \'' + key + '\' must be integer');
+    return value;
+  }
+
+  /**
+   * @param {*} json
+   * @return {!{width: number, height: number}}
+   */
+  function parseOrientation(json) {
+    const result = {};
+    const minDeviceSize = 50;
+    const maxDeviceSize = 9999;
+    result.width = parseIntValue(json, 'width');
+    if (result.width < 0 || result.width > maxDeviceSize ||
+        result.width < minDeviceSize)
+      throw new Error('Emulated device has wrong width: ' + result.width);
+
+    result.height = parseIntValue(json, 'height');
+    if (result.height < 0 || result.height > maxDeviceSize ||
+        result.height < minDeviceSize)
+      throw new Error('Emulated device has wrong height: ' + result.height);
+
+    return /** @type {!{width: number, height: number}} */ (result);
+  }
+
+  const result = {};
+  result.type = /** @type {string} */ (parseValue(json, 'type', 'string'));
+  result.userAgent = /** @type {string} */ (parseValue(json, 'user-agent', 'string'));
+
+  const capabilities = parseValue(json, 'capabilities', 'object', []);
+  if (!Array.isArray(capabilities))
+    throw new Error('Emulated device capabilities must be an array');
+  result.capabilities = [];
+  for (let i = 0; i < capabilities.length; ++i) {
+    if (typeof capabilities[i] !== 'string')
+      throw new Error('Emulated device capability must be a string');
+    result.capabilities.push(capabilities[i]);
+  }
+
+  result.deviceScaleFactor = /** @type {number} */ (parseValue(json['screen'], 'device-pixel-ratio', 'number'));
+  if (result.deviceScaleFactor < 0 || result.deviceScaleFactor > 100)
+    throw new Error('Emulated device has wrong deviceScaleFactor: ' + result.deviceScaleFactor);
+
+  result.vertical = parseOrientation(parseValue(json['screen'], 'vertical', 'object'));
+  result.horizontal = parseOrientation(parseValue(json['screen'], 'horizontal', 'object'));
+  return result;
+}
+
+/**
+ * @param {url}
+ * @return {!Promise}
+ */
+function httpGET(url) {
+  let fulfill, reject;
+  const promise = new Promise((res, rej) => {
+    fulfill = res;
+    reject = rej;
+  });
+  const driver = url.startsWith('https://') ? require('https') : require('http');
+  const request = driver.get(url, response => {
+    let data = '';
+    response.setEncoding('utf8');
+    response.on('data', chunk => data += chunk);
+    response.on('end', () => fulfill(data));
+    response.on('error', reject);
+  });
+  request.on('error', reject);
+  return promise;
+}