Index: gc_core/js/helpers.js
==================================================================
--- gc_core/js/helpers.js
+++ gc_core/js/helpers.js
@@ -5,24 +5,24 @@
 
 // In Firefox, there is no console.log in PromiseWorker, but there is worker.log.
 // In Thunderbird, you can’t access to console directly. So it’s required to pass a log function.
 let funcOutput = null;
 
-function setLogOutput (func) {
+export function setLogOutput (func) {
     funcOutput = func;
 }
 
-function echo (obj) {
+export function echo (obj) {
     if (funcOutput !== null) {
         funcOutput(obj);
     } else {
         console.log(obj);
     }
     return true;
 }
 
-function logerror (e, bStack=false) {
+export function logerror (e, bStack=false) {
     let sMsg = "\n" + e.fileName + "\n" + e.name + "\nline: " + e.lineNumber + "\n" + e.message;
     if (bStack) {
         sMsg += "\n--- Stack ---\n" + e.stack;
     }
     if (funcOutput !== null) {
@@ -34,11 +34,11 @@
 
 
 // load ressources in workers (suggested by Mozilla extensions reviewers)
 // for more options have a look here: https://gist.github.com/Noitidart/ec1e6b9a593ec7e3efed
 // if not in workers, use sdk/data.load() instead
-function loadFile (spf) {
+export function loadFile (spf) {
     try {
         let xRequest;
         if (typeof XMLHttpRequest !== "undefined") {
             xRequest = new XMLHttpRequest();
         }
@@ -56,33 +56,23 @@
         logerror(e);
         return null
     }
 }
 
-
-    
-
 
 // conversions
-function objectToMap (obj) {
+export function objectToMap (obj) {
     let m = new Map();
     for (let param in obj) {
         //console.log(param + " " + obj[param]);
         m.set(param, obj[param]);
     }
     return m;
 }
 
-function mapToObject (m) {
+export function mapToObject (m) {
     let obj = {};
     for (let [k, v] of m) {
         obj[k] = v;
     }
     return obj;
 }
-
-exports.echo = echo;
-exports.logerror = logerror;
-exports.objectToMap = objectToMap;
-exports.mapToObject = mapToObject;
-exports.setLogOutput = setLogOutput;
-exports.loadFile = loadFile;

ADDED   gc_lang/fr/oxt/_img/Algoo_logo.png
Index: gc_lang/fr/oxt/_img/Algoo_logo.png
==================================================================
--- /dev/null
+++ gc_lang/fr/oxt/_img/Algoo_logo.png
cannot compute difference between binary files

ADDED   gc_lang/fr/oxt/_img/logo120_text.png
Index: gc_lang/fr/oxt/_img/logo120_text.png
==================================================================
--- /dev/null
+++ gc_lang/fr/oxt/_img/logo120_text.png
cannot compute difference between binary files

ADDED   gc_lang/fr/tb/skin/Algoo_logo.png
Index: gc_lang/fr/tb/skin/Algoo_logo.png
==================================================================
--- /dev/null
+++ gc_lang/fr/tb/skin/Algoo_logo.png
cannot compute difference between binary files

Index: gc_lang/fr/webext/content_scripts/modify_page.js
==================================================================
--- gc_lang/fr/webext/content_scripts/modify_page.js
+++ gc_lang/fr/webext/content_scripts/modify_page.js
@@ -1,11 +1,14 @@
+import { echo } from "../mymodule";
+
+echo("CONTENT SCRIPRT!!!");
 
-function do_something (request, sender, sendResponse) {
-  //removeEverything();
+function handleMessage2 (oRequest, xSender, sendResponse) {
+  console.log(`[Content script] received: ${oRequest.content}`);
   change(request.myparam);
-  console.log("DONE!!");
-  browser.runtime.onMessage.removeListener(do_something);
+  //browser.runtime.onMessage.removeListener(handleMessage);
+  sendResponse({response: "response from content script"});
 }
 
 function removeEverything () {
   while (document.body.firstChild) {
     document.body.firstChild.remove();
@@ -20,6 +23,6 @@
 
 
 /*
   Assign do_something() as a listener for messages from the extension.
 */
-browser.runtime.onMessage.addListener(do_something);
+browser.runtime.onMessage.addListener(handleMessage2);

Index: gc_lang/fr/webext/gce_worker.js
==================================================================
--- gc_lang/fr/webext/gce_worker.js
+++ gc_lang/fr/webext/gce_worker.js
@@ -1,8 +1,16 @@
-// Background script
-// for calling the grammar checker engine
+/*
+import { echo } from "mymodule";
 
+try {
+    echo("It works! At last!");
+}
+catch (e) {
+    console.error(e);
+}
+*/
+"use strict";
 
 let gce = null; // module: grammar checker engine
 let text = null;
 let tkz = null; // module: tokenizer
 let lxg = null; // module: lexicographer
@@ -111,10 +119,17 @@
     return JSON.stringify([]);
 }
 
 
 function handleMessage (oRequest, xSender, sendResponse) {
-  console.log(`content script sent a message: ${oRequest.content}`);
+  console.log(`[background] received: ${oRequest.content}`);
   sendResponse({response: "response from background script"});
 }
 
 browser.runtime.onMessage.addListener(handleMessage);
+
+try {
+    loadGrammarChecker();
+}
+catch (e) {
+    console.error(e);
+}

Index: gc_lang/fr/webext/panel/main.js
==================================================================
--- gc_lang/fr/webext/panel/main.js
+++ gc_lang/fr/webext/panel/main.js
@@ -55,15 +55,15 @@
     showError(e);
   }
 }
 
 function handleResponse(message) {
-  console.log(`background script sent a response: ${message.response}`);
+  console.log(`[Panel] received: ${message.response}`);
 }
 
 function handleError(error) {
-  console.log(`Error: ${error}`);
+  console.log(`[Panel] Error: ${error}`);
 }
 
 function sendMessage (sMessage) {
   let sending = browser.runtime.sendMessage({content: sMessage});
   sending.then(handleResponse, handleError);  

ADDED   gc_lang/fr/xpi/data/img/Algoo_logo.png
Index: gc_lang/fr/xpi/data/img/Algoo_logo.png
==================================================================
--- /dev/null
+++ gc_lang/fr/xpi/data/img/Algoo_logo.png
cannot compute difference between binary files