diff --git a/.appveyor.yml b/.appveyor.yml
index 8e96c6d4..d0acb2c3 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -401,6 +401,12 @@ after_test:
   - 7z a %ZIP_FILE% .\..\..\install-DownZemAll-cmake\*
 
 # zip the browser addons
+
+# update manifest.json versions
+  - cd C:\projects\DownZemAll\web-extension\extension
+  - .\synchronize_versions.bat
+  - cd C:\projects\DownZemAll\bin
+
 # DownRightNow_webextension_firefox_v1.2.0.xpi
   - set ZIP_FIREFOX_WEB_EXTENSION="DownRightNow_firefox_v%AppVersion%.xpi"
   - 7z a %ZIP_FIREFOX_WEB_EXTENSION% .\..\web-extension\extension\firefox\*
diff --git a/version b/version
index 88c5fb89..347f5833 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-1.4.0
+1.4.1
diff --git a/web-extension/extension/substitute.py b/web-extension/extension/substitute.py
new file mode 100644
index 00000000..5b418518
--- /dev/null
+++ b/web-extension/extension/substitute.py
@@ -0,0 +1,32 @@
+#substitute.py
+#
+# Copyright 2019 Sebastien Vavassori. All rights reserved.
+# Use of this source code is governed by a LGPL license that can be
+# found in the LICENSE file.
+#
+import sys
+import os
+
+# print(sys.argv)
+
+oldvalue = sys.argv[1]
+newvaluefile = sys.argv[2]
+inputfile = sys.argv[3]
+outputfile = sys.argv[3] + "_temp"
+
+with open(newvaluefile) as f:
+    first_line = f.readline()
+
+newvalue = first_line.split('\n')
+
+fin = open(inputfile, "rt")
+fout = open(outputfile, "wt")
+
+for line in fin:
+	fout.write(line.replace(oldvalue, newvalue[0]))
+	
+fin.close()
+fout.close()
+
+os.remove(inputfile)
+os.rename(outputfile, inputfile)
diff --git a/web-extension/extension/synchronize_versions.bat b/web-extension/extension/synchronize_versions.bat
new file mode 100644
index 00000000..13874fe8
--- /dev/null
+++ b/web-extension/extension/synchronize_versions.bat
@@ -0,0 +1,16 @@
+@echo off
+:: Copyright 2019 Sébastien Vavassori. All rights reserved.
+:: Use of this source code is governed by a LGPL license that can be
+:: found in the LICENSE file.
+
+::
+:: This batch script rewrites the Firefox/Chrome manifest.json files 
+:: with the current value present in <root>/version
+::
+
+echo.Updating version...
+
+python substitute.py "1.4.0" .\..\..\version .\chromium\manifest.json
+python substitute.py "1.4.0" .\..\..\version  .\firefox\manifest.json
+
+echo.Version updated. 
diff --git a/web-extension/extension/version b/web-extension/extension/version
deleted file mode 100644
index 88c5fb89..00000000
--- a/web-extension/extension/version
+++ /dev/null
@@ -1 +0,0 @@
-1.4.0
diff --git a/web-extension/launcher/launcher-manifest-chrome.json b/web-extension/launcher/launcher-manifest-chrome.json
index 425769d5..4b9820df 100644
--- a/web-extension/launcher/launcher-manifest-chrome.json
+++ b/web-extension/launcher/launcher-manifest-chrome.json
@@ -3,5 +3,5 @@
   "description": "DownRightNow Launcher Host for Native Messaging",
   "path": "launcher.exe",
   "type": "stdio",
-  "allowed_origins": [ "chrome-extension://afodkgpjbniehgobgnpjpgdopfaonidl/" ]
+  "allowed_origins": [ "chrome-extension://modofbhnhlagjmejdbalnijgncppjeio/" ]
 }
diff --git a/web-extension/launcher/launcher.cpp b/web-extension/launcher/launcher.cpp
index abcab66a..0dfee035 100644
--- a/web-extension/launcher/launcher.cpp
+++ b/web-extension/launcher/launcher.cpp
@@ -78,7 +78,11 @@ void mSleep(int ms)
 
 static void sendDataToExtension(const std::string &message)
 {
+#if defined(Q_OS_WIN)
     _setmode(_fileno(stdout), O_BINARY);
+#else
+    freopen("file_out.txt", "wb", stdout); /* w = write, b = binary */
+#endif
     try {
         std::string json = "{\"text\": \"" + message + "\"}";
         std::string::size_type length = json.length();
@@ -125,7 +129,11 @@ static std::string cleanChromeMessage(const std::string &message)
 static std::string openStandardStreamIn()
 {
     std::cout.setf(std::ios_base::unitbuf);
+#if defined(Q_OS_WIN)
     _setmode(_fileno(stdin), _O_BINARY); /* Keep \n instead of \r\n */
+#else
+    freopen("file_in.txt", "rb", stdin); /* r = read, b = binary */
+#endif
 
     int size = 0;
     for (int i = 0; i <= 3; i++) {
@@ -162,7 +170,11 @@ static bool startInteractiveMode(const QString &program)
 #endif
 
     // Start the Application, detached from the Launcher
+#if QT_VERSION_MAJOR >= 5 && QT_VERSION_MINOR >= 10 // QT_VERSION >= 0x051000
     return process.startDetached();
+#else
+    return process.startDetached(program, QStringList() << "-i");
+#endif
 }
 
 static bool sendCommandToProcess(const QString &program, const QString &arguments)