diff --git a/docs/For Users/Migration/From 0.12 to 0.13.md b/docs/For Users/Migration/From 0.12 to 0.13.md
index a4773e741b..9c11d5b1b2 100644
--- a/docs/For Users/Migration/From 0.12 to 0.13.md	
+++ b/docs/For Users/Migration/From 0.12 to 0.13.md	
@@ -37,7 +37,7 @@
 
 ### Window
 
-+ There is an id to identify each window. This will be used to remember the size and position of the window and restore that geometry when a window with the same id is later opened. The default id is `.main`. It could be specified in [Window.open](../../References/Window.md#windowopenurl-options-callback)
++ There is an `id` to identify each window. This will be used to remember the size and position of the window and restore that geometry when a window with the same `id` is later opened. It could be specified in [Window.open](../../References/Window.md#windowopenurl-options-callback) or [window subfields in manifest](../../References/Manifest Format.md#id)
 + Event `capturepagedone` of [`Window` API](../../References/Window.md#event-capturepagedone) is **deprecated**.Use the callback with the [`win.capturePage(callback [, config ])`](../../References/Window.md#wincapturepagecallback--config-) instead.
 + [Window.open](../../References/Window.md#windowopenurl-options-callback) is changed to passing the created window as the argument of the callback.
 + [Window.showDevtools](../../References/Window.md#winshowdevtoolsiframe-headless-callback) is changed to passing the created window as the argument of the callback.
diff --git a/docs/References/Manifest Format.md b/docs/References/Manifest Format.md
index f6188c7fc9..8205b7b6ab 100644
--- a/docs/References/Manifest Format.md	
+++ b/docs/References/Manifest Format.md	
@@ -161,6 +161,10 @@ Most of window subfields are inherited by sub windows opened by `window.open()`
 
 All of the window subfields can be overwritten by using [`new-win-policy` event](Window.md#event-new-win-policy-frame-url-policy).
 
+### id
+
+* `{String}` the `id` used to identify the window. This will be used to remember the size and position of the window and restore that geometry when a window with the same id is later opened. [See also the Chrome App documentation](https://developer.chrome.com/apps/app_window#type-CreateWindowOptions)
+
 ### title
 
 * `{String}` the default title of window created by NW.js, it's very useful if you want to show your own title when the app is starting.
diff --git a/docs/References/Window.md b/docs/References/Window.md
index 52bcb7645f..1fd7b2722b 100644
--- a/docs/References/Window.md
+++ b/docs/References/Window.md
@@ -61,7 +61,7 @@ nw.Window.open('https://github.com/nwjs/nw.js', {}, function(new_win) {
     - `new_instance` `{Boolean}` _Optional_ whether to open a new window in a separate render process.
     - `inject_js_start` `{String}` _Optional_ the script to be injected before document loaded. See [Manifest format](Manifest Format.md#inject_js_start)
     - `inject_js_end` `{String}` _Optional_ the script to be injected before document unloaded. See [Manifest format](Manifest Format.md#inject_js_end)
-    - `id` `{String}` _Optional_ the ID used to identify the window. This will be used to remember the size and position of the window and restore that geometry when a window with the same id is later opened. [See also the Chrome App documentation](https://developer.chrome.com/apps/app_window#type-CreateWindowOptions)
+    - `id` `{String}` _Optional_ the `id` used to identify the window. This will be used to remember the size and position of the window and restore that geometry when a window with the same id is later opened. [See also the Chrome App documentation](https://developer.chrome.com/apps/app_window#type-CreateWindowOptions)
 * `callback(win)` `{Function}` _Optional_ callback when with the opened native `Window` object
 
 Open a new window and load `url` in it.
diff --git a/test/remoting/issue4493-win-open-size/index.html b/test/remoting/issue4493-win-open-size/index.html
new file mode 100644
index 0000000000..2780efb4c7
--- /dev/null
+++ b/test/remoting/issue4493-win-open-size/index.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <title>issue4493-win-open-size</title>
+</head>
+<body>
+  <button id="resize-window" onclick="resizeWindow()">Resize to 777x555</button>
+  <script>
+    function out(id, msg) {
+      var h1 = document.createElement('h1');
+      h1.setAttribute('id', id);
+      h1.innerHTML = msg;
+      document.body.appendChild(h1);
+    }
+    function resizeWindow() {
+      resizeTo(777,555);
+    }
+    window.onresize = function() {
+      out('resize', innerWidth + 'x' + innerHeight);
+    };
+    out('size', innerWidth + 'x' + innerHeight);
+  </script>
+</body>
+</html>
diff --git a/test/remoting/issue4493-win-open-size/package.json b/test/remoting/issue4493-win-open-size/package.json
new file mode 100644
index 0000000000..98708d0755
--- /dev/null
+++ b/test/remoting/issue4493-win-open-size/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "issue4493-win-open-size",
+  "main": "index.html",
+  "window": {
+    "width": 666,
+    "height": 333
+  }
+}
diff --git a/test/remoting/issue4493-win-open-size/test.py b/test/remoting/issue4493-win-open-size/test.py
new file mode 100644
index 0000000000..97291a03aa
--- /dev/null
+++ b/test/remoting/issue4493-win-open-size/test.py
@@ -0,0 +1,37 @@
+import time
+import os
+import platform
+
+from selenium import webdriver
+from selenium.webdriver.chrome.options import Options
+
+chrome_options = Options()
+chrome_options.add_argument("nwapp=" + os.path.dirname(os.path.abspath(__file__)))
+
+# open first time
+print 'Open first time'
+driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
+driver.implicitly_wait(10)
+time.sleep(1)
+try:
+    print driver.current_url
+    size = driver.find_element_by_id('size').get_attribute('innerHTML')
+    print 'open size %s' % size
+    driver.find_element_by_id('resize-window').click()
+    size = driver.find_element_by_id('resize').get_attribute('innerHTML')
+    print 'resize to %s' % size
+finally:
+    driver.quit()
+
+# open second time
+print 'Open second time'
+driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options)
+driver.implicitly_wait(10)
+time.sleep(1)
+try:
+    print driver.current_url
+    size = driver.find_element_by_id('size').get_attribute('innerHTML')
+    print 'open size %s' % size
+    assert(size == '666x333')
+finally:
+    driver.quit()
\ No newline at end of file