Index: gc_lang/fr/build.py
==================================================================
--- gc_lang/fr/build.py
+++ gc_lang/fr/build.py
@@ -7,12 +7,23 @@
 import helpers
 
 
 def build (sLang, dVars, spLangPack):
     "complementary build launched from make.py"
-    createFirefoxExtension(sLang, dVars)
-    createThunderbirdExtension(sLang, dVars, spLangPack)
+    #createFirefoxExtension(sLang, dVars)
+    createWebExtension(sLang, dVars)
+    #createThunderbirdExtension(sLang, dVars, spLangPack)
+
+
+def createWebExtension (sLang, dVars):
+    "create Web-extension"
+    print("Building Web-extension")
+    helpers.createCleanFolder("_build/webext/"+sLang)
+    dir_util.copy_tree("gc_lang/"+sLang+"/webext/", "_build/webext/"+sLang)
+    dir_util.copy_tree("grammalecte-js", "_build/webext/"+sLang+"/grammalecte")
+    with helpers.cd("_build/webext/"+sLang):
+        os.system("web-ext build")
 
 
 def createFirefoxExtension (sLang, dVars):
     "create extension for Firefox"
     print("Building extension for Firefox")

Index: gc_lang/fr/config.ini
==================================================================
--- gc_lang/fr/config.ini
+++ gc_lang/fr/config.ini
@@ -28,10 +28,12 @@
 oxt_identifier = French.linguistic.resources.from.Dicollecte.by.OlivierR
 
 # Firefox
 fx_identifier = French-GC@grammalecte.net
 fx_name = Grammalecte [fr]
+
+fx_nightly_path = C:\Program Files (x86)\Nightly\firefox.exe
 
 # Thunderbird
 tb_identifier = French-GC-TB@grammalecte.net
 tb_name = Grammalecte [fr]
 tb_debug_extension_path = _build/tb-debug.profile/extensions/French-GC-TB@grammalecte.net

ADDED   gc_lang/fr/webext/README.md
Index: gc_lang/fr/webext/README.md
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/README.md
@@ -0,0 +1,22 @@
+# Grammalecte
+
+**French Grammar Checker**
+
+écrit en JavaScript ES6/ES7
+par Olivier R.
+
+## Fonctionnalités ##
+
+* correcteur grammatical
+* conjugueur
+* formateur de texte
+* lexicographe
+
+## Site web ##
+
+https://grammalecte.net
+
+## Licence ##
+
+GNU GPL 3.0+
+http://www.gnu.org/copyleft/gpl.html

ADDED   gc_lang/fr/webext/content_scripts/modify_page.js
Index: gc_lang/fr/webext/content_scripts/modify_page.js
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/content_scripts/modify_page.js
@@ -0,0 +1,25 @@
+
+function do_something (request, sender, sendResponse) {
+  //removeEverything();
+  change(request.myparam);
+  console.log("DONE!!");
+  browser.runtime.onMessage.removeListener(do_something);
+}
+
+function removeEverything () {
+  while (document.body.firstChild) {
+    document.body.firstChild.remove();
+  }
+}
+
+function change (param) {
+  document.getElementById("title").setAttribute("background-color", "#809060");
+  console.log("param: " + param);
+  document.getElementById("title").setAttribute("background-color", "#FF0000");
+}
+
+
+/*
+  Assign do_something() as a listener for messages from the extension.
+*/
+browser.runtime.onMessage.addListener(do_something);

ADDED   gc_lang/fr/webext/img/logo-16.png
Index: gc_lang/fr/webext/img/logo-16.png
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/img/logo-16.png
cannot compute difference between binary files

ADDED   gc_lang/fr/webext/img/logo-32.png
Index: gc_lang/fr/webext/img/logo-32.png
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/img/logo-32.png
cannot compute difference between binary files

ADDED   gc_lang/fr/webext/img/logo-48.png
Index: gc_lang/fr/webext/img/logo-48.png
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/img/logo-48.png
cannot compute difference between binary files

ADDED   gc_lang/fr/webext/img/logo-64.png
Index: gc_lang/fr/webext/img/logo-64.png
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/img/logo-64.png
cannot compute difference between binary files

ADDED   gc_lang/fr/webext/img/logo-96.png
Index: gc_lang/fr/webext/img/logo-96.png
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/img/logo-96.png
cannot compute difference between binary files

ADDED   gc_lang/fr/webext/manifest.json
Index: gc_lang/fr/webext/manifest.json
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/manifest.json
@@ -0,0 +1,40 @@
+{
+  "manifest_version": 2,
+  "name": "Grammalecte [fr]",
+  "short_name": "Grammalecte [fr]",
+  "version": "0.6",
+
+  "applications": {
+    "gecko": {
+      "id": "French-GC@grammalecte.net",
+      "strict_min_version": "54.0"
+    }
+  },
+
+  "author": "Olivier R.",
+  "homepage_url": "https://grammalecte.net",
+  "offline_enabled": true,
+
+  "description": "Correcteur grammatical pour le français.",
+
+  "icons": { "16": "img/logo-16.png",
+             "32": "img/logo-32.png",
+             "48": "img/logo-48.png",
+             "64": "img/logo-64.png",
+             "96": "img/logo-96.png" },
+
+  "browser_action": {
+    "default_icon": "img/logo-32.png",
+    "default_popup": "panel/main.html",
+    "default_title": "Grammalecte [fr]",
+    "browser_style": false
+  },
+  "web_accessible_resources": [
+    "beasts/frog.jpg",
+    "beasts/turtle.jpg",
+    "beasts/snake.jpg"
+  ],
+  "permissions": [
+    "activeTab"
+  ]
+}

ADDED   gc_lang/fr/webext/panel/main.css
Index: gc_lang/fr/webext/panel/main.css
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/panel/main.css
@@ -0,0 +1,90 @@
+/*
+    flexbox:
+    https://css-tricks.com/snippets/css/a-guide-to-flexbox/
+*/
+
+
+/* Cleaner */
+
+* { margin: 0; padding: 0; }
+img { border: none; }
+
+
+/* Generic classes */
+
+.fleft { float: left; }
+.fright { float: right; }
+.fleftm { float: left; margin-right: 10px; }
+.frightm { float: right; margin-left: 10px; }
+.clearer { clear: both; font-size: 0; height: 0; }
+.center { text-align: center; }
+
+
+a:link, a:visited {
+    color: hsl(210, 70%, 40%);
+    /*text-decoration: none;*/
+}
+a:hover, a:active {
+    text-shadow: 0 0 2px hsl(210, 80%, 60%);
+}
+
+a.extlink:hover:after {
+    content: " >";
+}
+
+::-moz-selection {
+    background-color: hsl(210, 50%, 60%);
+    color: hsl(210, 20%, 100%);
+    text-shadow: 0 0 2px hsl(210, 80%, 20%);
+    border-radius: 2px;
+}
+::selection {
+    background-color: hsl(210, 50%, 60%);
+    color: hsl(210, 20%, 100%);
+    text-shadow: 0 0 2px hsl(210, 80%, 20%);
+    border-radius: 2px;
+}
+
+
+/* Main classes */
+
+html {
+    box-sizing: border-box;
+    width: 530px;
+    height: 600px;
+    font-family: "Trebuchet MS", "Liberation Sans", sans-serif;
+}
+body {
+    width: 530px;
+    height: 600px;
+}
+
+#main {
+    display: flex;
+    flex-direction: row;
+    flex-wrap: nowrap;
+    align-items: stretch;
+    background-color: hsl(210, 0%, 100%);
+    min-height: 100%;
+}
+#left {
+    width: 30px;
+    padding: 20px;
+    background-color: hsl(210, 10%, 96%);
+    border-right: solid 1px hsl(210, 0%, 70%);
+    color: hsl(210, 10%, 96%);
+}
+
+#page {
+    background-color: hsl(210, 0%, 100%);
+    padding: 10px;
+}
+
+#page p {
+    margin: 10px 0 5px 0;
+}
+#page h2 {
+    margin: 20px 0 10px 0;
+    color: hsl(210, 70%, 70%);
+    font: bold 42px 'Yanone Kaffeesatz', "Liberation Sans Narrow", sans-serif;
+}

ADDED   gc_lang/fr/webext/panel/main.html
Index: gc_lang/fr/webext/panel/main.html
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/panel/main.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+
+<html>
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="main.css"/>
+  </head>
+
+  <body>
+    <div id="main">
+
+      <header id="left">
+        <nav id="menu">
+          <header id="title">
+            <img src="../img/logo-32.png">
+          </header>
+          <ul>
+            <li><a href="#home" onclick="loadHtml('home');"><i class="fa fa-home icon"></i> 1.</a></li>
+            <li><a href="#conj" onclick="loadHtml('conj');"><i class="fa fa-star icon"></i> CJ</a></li>
+            <li><a href="#tf" onclick="loadHtml('tf');"><i class="fa fa-photo icon"></i> TF</a></li>
+            <li><a href="#cg" onclick="loadHtml('cg');"><i class="fa fa-question-circle icon"></i> CG</a></li>
+            <li><a href="#op1" onclick="loadHtml('op1');"><i class="fa fa-coffee icon"></i> OP1</a></li>
+            <li><a href="#op2" onclick="loadHtml('op2');"><i class="fa fa-keyboard-o icon"></i> OP2</a></li>
+            <li><a href="#lxg" onclick="loadHtml('lxg');"><i class="fa fa-keyboard-o icon"></i> LXG</a></li>
+            <li><a href="#tests" onclick="loadHtml('lxg');"><i class="fa fa-keyboard-o icon"></i> TST</a></li>
+          </ul>
+        </nav>
+      </header> <!-- #left -->
+
+
+      <div id="page">
+        <article id="loadedpage">
+          <!-- here goes the page loaded via JS -->
+        </article>
+      </div> <!-- #page -->
+
+    </div> <!-- #main -->
+
+    <script src="main.js"></script>
+  </body>
+
+</html>

ADDED   gc_lang/fr/webext/panel/main.js
Index: gc_lang/fr/webext/panel/main.js
==================================================================
--- /dev/null
+++ gc_lang/fr/webext/panel/main.js
@@ -0,0 +1,30 @@
+
+function showError (e) {
+  console.error(e.fileName + "\n" + e.name + "\nline: " + e.lineNumber + "\n" + e.message);
+}
+
+function beastNameToURL(beastName) {
+  switch (beastName) {
+    case "Frog":
+      return browser.extension.getURL("beasts/frog.jpg");
+    case "Snake":
+      return browser.extension.getURL("beasts/snake.jpg");
+    case "Turtle":
+      return browser.extension.getURL("beasts/turtle.jpg");
+  }
+}
+
+window.addEventListener(
+  "click",
+  function (xEvent) {
+    let xElem = xEvent.target;
+    if (xElem.id) {
+      if (xElem.id) {
+
+      }
+    } else if (xElem.tagName === "A") {
+      openURL(xElem.getAttribute("href"));
+    }
+  },
+  false
+);

Index: make.py
==================================================================
--- make.py
+++ make.py
@@ -286,10 +286,11 @@
     xParser.add_argument("-t", "--tests", help="run unit tests", action="store_true")
     xParser.add_argument("-p", "--perf", help="run performance tests", action="store_true")
     xParser.add_argument("-pm", "--perf_memo", help="run performance tests and store results in perf_memo.txt", action="store_true")
     xParser.add_argument("-js", "--javascript", help="JavaScript build for Firefox", action="store_true")
     xParser.add_argument("-fx", "--firefox", help="Launch Firefox Nightly for XPI testing", action="store_true")
+    xParser.add_argument("-we", "--web_ext", help="Launch Firefox Nightly for WebExtension testing", action="store_true")
     xParser.add_argument("-tb", "--thunderbird", help="Launch Thunderbird", action="store_true")
     xParser.add_argument("-i", "--install", help="install the extension in Writer (path of unopkg must be set in config.ini)", action="store_true")
     xArgs = xParser.parse_args()
 
     if xArgs.build_data:
@@ -349,14 +350,18 @@
             # Firefox
             if xArgs.firefox:
                 with helpers.cd("_build/xpi/"+sLang):
                     os.system("jpm run -b nightly")
 
+            if xArgs.web_ext:
+                with helpers.cd("_build/webext/"+sLang):
+                    os.system(r'web-ext run --firefox="' + dVars['fx_nightly_path'] + '" --browser-console')            
+
             # Thunderbird
             if xArgs.thunderbird:
                 os.system("thunderbird -jsconsole -P debug")
         else:
             print("Folder not found: gc_lang/"+sLang)
 
 
 if __name__ == '__main__':
     main()