diff --git a/README.md b/README.md
index 314dfc13..c1b933cf 100644
--- a/README.md
+++ b/README.md
@@ -156,8 +156,8 @@ directly.
 - [Tutorial](docs/Tutorial.md)
 
 
-### API categories
-
+### API categories
+
 #### Modules
 
  * [cefpython](api/cefpython.md#cefpython) module
@@ -212,9 +212,9 @@ directly.
  * [StringVisitor](api/StringVisitor.md#stringvisitor-interface) interface
  * [WebRequestClient](api/WebRequestClient.md#webrequestclient-interface) interface
 
-
-### API index
-
+
+### API index
+
 * [Application settings](api/ApplicationSettings.md#application-settings)
   * [accept_language_list](api/ApplicationSettings.md#accept_language_list)
   * [auto_zooming](api/ApplicationSettings.md#auto_zooming)
@@ -366,6 +366,7 @@ directly.
   * [MessageLoop](api/cefpython.md#messageloop)
   * [MessageLoopWork](api/cefpython.md#messageloopwork)
   * [PostTask](api/cefpython.md#posttask)
+  * [PostDelayedTask](api/cefpython.md#postdelayedtask)
   * [QuitMessageLoop](api/cefpython.md#quitmessageloop)
   * [SetGlobalClientCallback](api/cefpython.md#setglobalclientcallback)
   * [SetOsModalLoop](api/cefpython.md#setosmodalloop)
diff --git a/api/API-index.md b/api/API-index.md
index a1ab99c2..69f45920 100644
--- a/api/API-index.md
+++ b/api/API-index.md
@@ -153,6 +153,7 @@
   * [MessageLoop](cefpython.md#messageloop)
   * [MessageLoopWork](cefpython.md#messageloopwork)
   * [PostTask](cefpython.md#posttask)
+  * [PostDelayedTask](cefpython.md#postdelayedtask)
   * [QuitMessageLoop](cefpython.md#quitmessageloop)
   * [SetGlobalClientCallback](cefpython.md#setglobalclientcallback)
   * [SetOsModalLoop](cefpython.md#setosmodalloop)
diff --git a/api/cefpython.md b/api/cefpython.md
index d93a16e3..ea7c54cd 100644
--- a/api/cefpython.md
+++ b/api/cefpython.md
@@ -23,6 +23,7 @@ Table of contents:
   * [MessageLoop](#messageloop)
   * [MessageLoopWork](#messageloopwork)
   * [PostTask](#posttask)
+  * [PostDelayedTask](#postdelayedtask)
   * [QuitMessageLoop](#quitmessageloop)
   * [SetGlobalClientCallback](#setglobalclientcallback)
   * [SetOsModalLoop](#setosmodalloop)
@@ -229,7 +230,7 @@ Description from upstream CEF:
 
 | Parameter | Type |
 | --- | --- |
-| threadId | int |
+| thread | int |
 | func | object |
 | [args..] | mixed |
 | __Return__ | void |
@@ -251,6 +252,20 @@ List of threads in the Renderer process:
 * cef.TID_RENDERER: The main thread in the renderer. Used for all webkit and V8 interaction.
 
 
+### PostDelayedTask
+
+| Parameter | Type |
+| --- | --- |
+| thread | int |
+| delay_ms | int |
+| func | object |
+| [args..] | mixed |
+| __Return__ | void |
+
+Post a task for delayed execution on the specified thread. This
+function behaves similarly to PostTask above, but with an additional
+|delay_ms| argument.
+
 
 ### QuitMessageLoop
 
diff --git a/src/client_handler/task.cpp b/src/client_handler/task.cpp
index 8767e515..ec032a2d 100644
--- a/src/client_handler/task.cpp
+++ b/src/client_handler/task.cpp
@@ -7,17 +7,23 @@
 #include "include/base/cef_bind.h"
 
 void PostTaskWrapper(int threadId, int taskId) {
-    // Calling CefPostDelayedTask with 0ms delay seems to give 
-    // better responsiveness than CefPostTask. In wxpython.py 
-    // on Windows the freeze when creating popup window feels 
-    // shorter, when compared to a call to CefPostTask.
+    CefPostTask(
+            static_cast<CefThreadId>(threadId),
+            CefCreateClosureTask(base::Bind(
+                    &PyTaskRunnable,
+                    taskId
+            ))
+    );
+}
+
+void PostDelayedTaskWrapper(int threadId, int64 delay_ms, int taskId) {
     CefPostDelayedTask(
             static_cast<CefThreadId>(threadId),
             CefCreateClosureTask(base::Bind(
                     &PyTaskRunnable,
                     taskId
             )),
-            0
+            delay_ms
     );
 }
 
diff --git a/src/client_handler/task.h b/src/client_handler/task.h
index ee982169..1839d9e3 100644
--- a/src/client_handler/task.h
+++ b/src/client_handler/task.h
@@ -9,6 +9,7 @@
 #include "include/cef_task.h"
 
 void PostTaskWrapper(int threadId, int taskId);
+void PostDelayedTaskWrapper(int threadId, int64 delay_ms, int taskId);
 
 CefRefPtr<CefTask> CreateTask_SetCookie(
         CefCookieManager* obj,
diff --git a/src/compile_time_constants.pxi b/src/compile_time_constants.pxi
index 10ec798a..35f85002 100644
--- a/src/compile_time_constants.pxi
+++ b/src/compile_time_constants.pxi
@@ -1,3 +1,3 @@
 # This file was generated by setup.py
-DEF UNAME_SYSNAME = "Windows"
+DEF UNAME_SYSNAME = "Linux"
 DEF PY_MAJOR_VERSION = 2
diff --git a/src/extern/cef/cef_task.pxd b/src/extern/cef/cef_task.pxd
index 9ca2aaec..806cbe89 100644
--- a/src/extern/cef/cef_task.pxd
+++ b/src/extern/cef/cef_task.pxd
@@ -5,6 +5,7 @@
 from libcpp cimport bool as cpp_bool
 # noinspection PyUnresolvedReferences
 cimport cef_types
+from cef_types cimport int64
 from cef_ptr cimport CefRefPtr
 
 cdef extern from "include/cef_task.h":
@@ -12,7 +13,11 @@ cdef extern from "include/cef_task.h":
     ctypedef cef_types.cef_thread_id_t CefThreadId
     
     cdef cpp_bool CefCurrentlyOn(CefThreadId)
-    cdef cpp_bool CefPostTask(CefThreadId threadId, CefRefPtr[CefTask] task)
+    cdef cpp_bool CefPostTask(CefThreadId threadId,
+                              CefRefPtr[CefTask] task)
+    cdef cpp_bool CefPostDelayedTask(CefThreadId threadId,
+                                     CefRefPtr[CefTask] task,
+                                     int64 delay_ms)
     
     cdef cppclass CefTask:
         pass
diff --git a/src/extern/task.pxd b/src/extern/task.pxd
index b4e75e14..14f2777b 100644
--- a/src/extern/task.pxd
+++ b/src/extern/task.pxd
@@ -11,11 +11,13 @@ from cef_cookie cimport CefCookie, CefCookieManager
 from cef_cookie cimport CefSetCookieCallback, CefDeleteCookiesCallback
 # noinspection PyUnresolvedReferences
 from libcpp cimport bool as cpp_bool
+from cef_types cimport int64
 
 
 cdef extern from "client_handler/task.h":
 
     void PostTaskWrapper(int threadId, int taskId) nogil
+    void PostDelayedTaskWrapper(int threadId, int64 delay_ms, int taskId) nogil
 
     cdef CefRefPtr[CefTask] CreateTask_SetCookie(
             CefCookieManager* obj,
diff --git a/src/task.pyx b/src/task.pyx
index 43f99425..2af14983 100644
--- a/src/task.pyx
+++ b/src/task.pyx
@@ -7,11 +7,11 @@ include "cefpython.pyx"
 g_taskMaxId = 0
 g_tasks = {}
 
-def PostTask(int threadId, object func, *args):
+def PostTask(int thread, object func, *args):
     global g_tasks, g_taskMaxId
 
     # Validate threadId.
-    if threadId not in g_browserProcessThreads:
+    if thread not in g_browserProcessThreads:
         raise Exception("PoastTask failed: requires a browser process thread")
 
     # Validate func.
@@ -31,7 +31,35 @@ def PostTask(int threadId, object func, *args):
     # Call C++ wrapper.
     cdef int cTaskId = int(g_taskMaxId)
     with nogil:
-        PostTaskWrapper(threadId, cTaskId)
+        PostTaskWrapper(thread, cTaskId)
+
+
+def PostDelayedTask(int thread, int delay_ms, object func, *args):
+    global g_tasks, g_taskMaxId
+
+    # Validate threadId.
+    if thread not in g_browserProcessThreads:
+        raise Exception("PoastTask failed: requires a browser process thread")
+
+    # Validate func.
+    if not IsFunctionOrMethod(type(func)):
+        raise Exception("PostTask failed: not a function nor method")
+
+    # Params.
+    cdef list params = list(args)
+
+    # Keep func and params until PyTaskRunnable is called.
+    g_taskMaxId += 1
+    g_tasks[str(g_taskMaxId)] = {
+        "func": func,
+        "params": params
+    }
+
+    # Call C++ wrapper.
+    cdef int cTaskId = int(g_taskMaxId)
+    with nogil:
+        PostDelayedTaskWrapper(thread, delay_ms, cTaskId)
+
 
 cdef public void PyTaskRunnable(int taskId) except * with gil:
     cdef object func