Update EMBEDDING.md

docs/EMBEDDING.md

@@ -59,7 +59,7 @@ query string. Currently the following options are available:
   it cannot fit in the browser.
 
 * `resize` - How to resize the remote session if it is not the same size as
-  the browser window. Can be one of `off`, `browser`, `scale` and `remote`.
+  the browser window. Can be one of `off`, [`browser`](#resizebrowser), `scale` and `remote`.
 
 * `quality` - The session JPEG quality level. Can be `0` to `9`.
 
@@ -103,3 +103,28 @@ Nginx:
     # In the location block related to noVNC
     add_header Cache-Control no-cache;
 ```
+
+### resize:browser
+
+  For security reasons, it's no longer possible in Firefox for
+  a website to change the default size of a window in a browser
+  if the window wasn't created by , or contains more than one tab.
+  See the compatibility table for details on the change. window.open()
+
+  Even if you create window by it is not resizable by default.
+  To make the window resizable, you must open it with the feature.
+  window.open()"`resizable`"
+
+```js
+window.open('vnc.html/token=token&autoconnect=1&resize=browser','_blank','toolbar=no,location=no,status=no,menubar=no,resizable=yes,width=800,height=420'); 
+```
+
+#### Browser compatibility
+
+ | browser     | version    | resize:browser
+ | ------------ | ---- | ----------- 
+ | `Chrome` | 1 | `window.open(rul,,"_blank","resizable=yes")` 
+ | `Edge` | 12 | `window.open(rul,,"_blank","resizable=yes")` 
+ | `Firefox` | 1 | `window.open(rul,,"_blank","resizable=yes")` 
+ | `Opera` | 12.1 | `window.open(rul,,"_blank","resizable=yes")` 
+ | `Safari` | 1 | `window.open(rul,,"_blank","resizable=yes")`