diff --git a/filenames.gypi b/filenames.gypi
index af1942fc3697..2b87e36fa4d2 100644
--- a/filenames.gypi
+++ b/filenames.gypi
@@ -64,6 +64,7 @@
       'lib/renderer/api/screen.js',
       'lib/renderer/api/web-frame.js',
       'lib/renderer/extensions/i18n.js',
+      'lib/renderer/extensions/storage.js',
     ],
     'js2c_sources': [
       'lib/common/asar.js',
diff --git a/lib/renderer/chrome-api.js b/lib/renderer/chrome-api.js
index 4a3556c37e67..fdc16f7375d2 100644
--- a/lib/renderer/chrome-api.js
+++ b/lib/renderer/chrome-api.js
@@ -183,12 +183,7 @@ exports.injectTo = function (extensionId, isBackgroundPage, context) {
     onMessage: chrome.runtime.onMessage
   }
 
-  chrome.storage = {
-    sync: {
-      get () {},
-      set () {}
-    }
-  }
+  chrome.storage = require('./extensions/storage.js')
 
   chrome.pageAction = {
     show () {},
diff --git a/lib/renderer/extensions/storage.js b/lib/renderer/extensions/storage.js
new file mode 100644
index 000000000000..7b880f08310e
--- /dev/null
+++ b/lib/renderer/extensions/storage.js
@@ -0,0 +1,59 @@
+const getStorage = () => {
+  const data = window.localStorage.getItem('__chrome.storage.sync__')
+  if (data != null) {
+    return JSON.parse(data)
+  } else {
+    return {}
+  }
+}
+
+const setStorage = (storage) => {
+  const json = JSON.stringify(storage)
+  window.localStorage.setItem('__chrome.storage.sync__', json)
+}
+
+module.exports = {
+  sync: {
+    get (keys, callback) {
+      const storage = getStorage()
+      if (keys == null) return storage
+
+      let defaults = {}
+      switch (typeof keys) {
+        case 'string':
+          keys = [keys]
+          break
+        case 'object':
+          if (!Array.isArray(keys)) {
+            defaults = keys
+            keys = Object.keys(keys)
+          }
+          break
+      }
+      if (keys.length === 0) return {}
+
+      let items = {}
+      keys.forEach(function (key) {
+        var value = storage[key]
+        if (value == null) value = defaults[key]
+        items[key] = value
+      })
+
+      setTimeout(function () {
+        callback(items)
+      })
+    },
+
+    set (items, callback) {
+      const storage = getStorage()
+
+      Object.keys(items).forEach(function (name) {
+        storage[name] = items[name]
+      })
+
+      setStorage(storage)
+
+      setTimeout(callback)
+    }
+  }
+}
diff --git a/spec/api-browser-window-spec.js b/spec/api-browser-window-spec.js
index a5a1478d6908..5048f3cd4a93 100644
--- a/spec/api-browser-window-spec.js
+++ b/spec/api-browser-window-spec.js
@@ -878,6 +878,7 @@ describe('browser-window module', function () {
             assert.equal(message.runtimeId, 'foo')
             assert.equal(message.tabId, w.webContents.id)
             assert.equal(message.i18nString, 'foo - bar (baz)')
+            assert.deepEqual(message.storageItems, {foo: 'bar'})
             done()
           })
         })
diff --git a/spec/fixtures/devtools-extensions/foo/index.html b/spec/fixtures/devtools-extensions/foo/index.html
index 414370ae2c06..b10288227aca 100644
--- a/spec/fixtures/devtools-extensions/foo/index.html
+++ b/spec/fixtures/devtools-extensions/foo/index.html
@@ -4,13 +4,22 @@
     <meta charset="utf-8">
     <title></title>
     <script>
-      var message = JSON.stringify({
-        runtimeId: chrome.runtime.id,
-        tabId: chrome.devtools.inspectedWindow.tabId,
-        i18nString: chrome.i18n.getMessage('foo', ['bar', 'baz'])
+      function testStorage (callback) {
+        chrome.storage.sync.set({foo: 'bar'}, function () {
+          chrome.storage.sync.get({foo: 'baz'}, callback)
+        })
+      }
+
+      testStorage(function (items) {
+        var message = JSON.stringify({
+          runtimeId: chrome.runtime.id,
+          tabId: chrome.devtools.inspectedWindow.tabId,
+          i18nString: chrome.i18n.getMessage('foo', ['bar', 'baz']),
+          storageItems: items
+        })
+        var sendMessage = `require('electron').ipcRenderer.send('answer', ${message})`
+        window.chrome.devtools.inspectedWindow.eval(sendMessage, function () {})
       })
-      var sendMessage = `require('electron').ipcRenderer.send('answer', ${message})`
-      window.chrome.devtools.inspectedWindow.eval(sendMessage, function () {})
     </script>
   </head>
   <body>