Index: gc_lang/fr/webext/background.js
==================================================================
--- gc_lang/fr/webext/background.js
+++ gc_lang/fr/webext/background.js
@@ -216,10 +216,16 @@
             xGCEWorker.postMessage(oRequest);
             break;
         case "openURL":
             browser.tabs.create({url: dParam.sURL});
             break;
+        case "openConjugueurTab":
+            openConjugueurTab();
+            break;
+        case "openLexiconEditor":
+            openLexiconEditor(dParam["dictionary"]);
+            break;
         default:
             console.log("[background] Unknown command: " + sCommand);
             console.log(oRequest);
     }
     //sendResponse({response: "response from background script"});
@@ -227,10 +233,11 @@
 
 browser.runtime.onMessage.addListener(handleMessage);
 
 
 function handleConnexion (xPort) {
+    // Messages from tabs
     let iPortId = xPort.sender.tab.id; // identifier for the port: each port can be found at dConnx[iPortId]
     dConnx.set(iPortId, xPort);
     xPort.onMessage.addListener(function (oRequest) {
         let {sCommand, dParam, dInfo} = oRequest;
         switch (sCommand) {
@@ -349,15 +356,27 @@
             break;
         case "conjugueur_window":
             openConjugueurWindow();
             break;
         case "lex_editor":
-            openLexEditor();
+            openLexiconEditor();
             break;
     }
 });
 
+
+/*
+    Lexicon editor tab
+*/
+let nTabLexiconEditor = null;
+
+browser.tabs.onRemoved.addListener(function (nTabId, xRemoveInfo) {
+    if (nTabId === nTabLexiconEditor) {
+        nTabLexiconEditor = null;
+    }
+});
+
 
 /*
     Actions
 */
 
@@ -371,21 +390,28 @@
 function sendCommandToTab (sCommand, iTab) {
     let xTabPort = dConnx.get(iTab);
     xTabPort.postMessage({sActionDone: sCommand, result: null, dInfo: null, bEnd: false, bError: false});
 }
 
-function openLexEditor () {
-    if (bChrome) {
-        browser.tabs.create({
+function openLexiconEditor (sName="__personal__") {
+    if (nTabLexiconEditor === null) {
+        if (bChrome) {
+            browser.tabs.create({
+                url: browser.extension.getURL("panel/lex_editor.html")
+            }, onLexiconEditorOpened);
+            return;
+        }
+        let xLexEditor = browser.tabs.create({
             url: browser.extension.getURL("panel/lex_editor.html")
         });
-        return;
+        xLexEditor.then(onLexiconEditorOpened, onError);
     }
-    let xLexEditor = browser.tabs.create({
-        url: browser.extension.getURL("panel/lex_editor.html")
-    });
-    xLexEditor.then(onCreated, onError);
+}
+
+function onLexiconEditorOpened (xTab) {
+    //console.log(xTab);
+    nTabLexiconEditor = xTab.id;
 }
 
 function openConjugueurTab () {
     if (bChrome) {
         browser.tabs.create({
@@ -422,7 +448,7 @@
 function onCreated (xWindowInfo) {
     //console.log(`Created window: ${xWindowInfo.id}`);
 }
 
 function onError (error) {
-    console.log(`Error: ${error}`);
+    console.log(error);
 }

Index: gc_lang/fr/webext/panel/main.css
==================================================================
--- gc_lang/fr/webext/panel/main.css
+++ gc_lang/fr/webext/panel/main.css
@@ -84,11 +84,11 @@
 }
 body {
     width: 450px;
     height: 500px;
 }
-/* 
+/*
     Maximal height of a panel in WebExtention seems to be 500px.
     When going over this limit, a scrollbar appears which destructs the
     horizontal balance of elements.
     --> vertical scrolling is done with overflow in #page.
         #page must have the same height than body.
@@ -245,10 +245,29 @@
     font-size: 16px;
     text-align: center;
     cursor: pointer;
 }
 
+
+.option_section {
+    padding: 10px;
+    margin-top: 10px;
+    border-radius: 5px;
+    background-color: hsl(210, 20%, 96%);
+}
+.option_section label {
+    font-size: 16px;
+    line-height: 20px;
+    color: hsl(210, 20%, 50%);
+    font-weight: bold;
+}
+.option_description {
+    padding: 0 0 0 20px;
+    color: hsl(0, 0%, 0%);
+    font-size: 12px;
+}
+
 
 /*
     Spell checking options
 */
 #sc_options_page {
@@ -265,30 +284,19 @@
 #sc_options_page h2 {
     margin-top: 20px;
     font: normal 22px 'Yanone Kaffeesatz', "Oswald", "Liberation Sans Narrow", sans-serif;
     color: hsl(210, 50%, 50%);
 }
-
-/*
-    Options
-*/
-.option_section {
-    padding: 10px;
-    margin-top: 10px;
-    border-radius: 5px;
-    background-color: hsl(210, 20%, 96%);
-}
-.option_section label {
-    font-size: 16px;
-    line-height: 20px;
-    color: hsl(210, 20%, 50%);
-    font-weight: bold;
-}
-.option_description {
-    padding: 0 0 0 20px;
-    color: hsl(0, 0%, 0%);
-    font-size: 12px;
+.dic_button {
+    float: right;
+    padding: 2px 10px;
+    background-color: hsl(210, 50%, 50%);
+    color: hsl(210, 10%, 96%);
+    cursor: pointer;
+    font-size: 14px;
+    font-variant-caps: small-caps;
+    border-radius: 3px;
 }
 
 
 /*
   Test page
@@ -372,11 +380,11 @@
 .double-bounce2 {
     animation-delay: -1.0s;
 }
 
 @keyframes sk-bounce {
-    0%, 100% { 
+    0%, 100% {
         transform: scale(0.0);
-    } 50% { 
+    } 50% {
         transform: scale(1.0);
     }
 }

Index: gc_lang/fr/webext/panel/main.html
==================================================================
--- gc_lang/fr/webext/panel/main.html
+++ gc_lang/fr/webext/panel/main.html
@@ -106,22 +106,23 @@
 
         <section id="sc_options_page" class="page">
           <h1>OPTIONS ORTHOGRAPHIQUES</h1>
           <div id="hunspell_options">
             <h2>DICTIONNAIRES DE GRAMMALECTE</h2>
-            <p class="dictionaries_info">Ces dictionnaires ne sont utilisés que lors de l’analyse grammaticale.</p>
             <div class="option_section" id="main_dic_box">
-                <p><input type="checkbox" id="main_dic" data-dictionary="personal" checked disabled="disabled" /> <label for="main_dic">Dictionnaire principal</label></p>
-                <p class="option_description">Environ 83 000 entrées, 500 000 flexions.<br/>Ni éditable, ni désactivable.</p>
+                <p><input type="checkbox" id="main_dic" data-dictionary="main" checked disabled="disabled" /> <label for="main_dic">Dictionnaire principal</label></p>
+                <p class="option_description">Environ 83 000 entrées, 500 000 flexions.<br/>Ni éditable, ni désactivable.<br/>Ce dictionnaire est créé à partir du dictionnaire orthographique pour Firefox et LibreOffice, conçu sur le <a id="link_grammalecte" class="link" data-url="http://grammalecte.net/home.php?prj=fr">site de Grammalecte</a>.</p>
             </div>
-            <div class="option_section" id="community_dic_box" style="opacity: .33;">
-                <p><input type="checkbox" id="community_dic" data-dictionary="personal" disabled="disabled" /> <label for="community_dic">Dictionnaire communautaire</label></p>
-                <p class="option_description">Fonctionnalité à venir.</p>
+            <div class="option_section" id="community_dic_box">
+                <p><input type="checkbox" id="community_dic" data-dictionary="community" /> <label for="community_dic">Dictionnaire communautaire</label></p>
+                <div class="dic_button" id="dic_community_button">Éditer</div>
+                <p class="option_description">Ce dictionnaire est créé et édité via l’éditeur lexical et est sauvegardé sur un serveur en ligne accessible à tous les membres.</p>
             </div>
             <div class="option_section" id="personal_dic_box">
                 <p><input type="checkbox" id="personal_dic" data-dictionary="personal" /> <label for="personal_dic">Dictionnaire personnel</label></p>
-                <p class="option_description">Ce dictionnaire est créé et édité via l’éditeur lexical.</p>
+                <div class="dic_button" id="dic_personal_button">Éditer</div>
+                <p class="option_description">Ce dictionnaire est créé et édité via l’éditeur lexical et n’est pas partagé.</p>
             </div>
           </div>
 
           <div id="hunspell_options" style="display: none; opacity: .25">
             <h2>DICTIONNAIRES HUNSPELL</h2>

Index: gc_lang/fr/webext/panel/main.js
==================================================================
--- gc_lang/fr/webext/panel/main.js
+++ gc_lang/fr/webext/panel/main.js
@@ -70,11 +70,29 @@
             }
             else if (xElem.id.startsWith("link_")) {
                 browser.tabs.create({url: xElem.dataset.url});
             }
             else if (xElem.id == "conj_button") {
-                openConjugueurTab();
+                browser.runtime.sendMessage({
+                    sCommand: "openConjugueurTab",
+                    dParam: {},
+                    dInfo: {}
+                });
+            }
+            else if (xElem.id == "dic_community_button") {
+                browser.runtime.sendMessage({
+                    sCommand: "openLexiconEditor",
+                    dParam: { "dictionary": "__community__"},
+                    dInfo: {}
+                });
+            }
+            else if (xElem.id == "dic_personal_button") {
+                browser.runtime.sendMessage({
+                    sCommand: "openLexiconEditor",
+                    dParam: { "dictionary": "__personal__"},
+                    dInfo: {}
+                });
             }
         } else if (xElem.className.startsWith("select")) {
             showPage(xElem.dataset.page);
         }/* else if (xElem.tagName === "A") {
             openURL(xElem.getAttribute("href"));
@@ -82,11 +100,11 @@
     },
     false
 );
 
 
-/* 
+/*
     Message sender
     and response handling
 */
 function handleResponse (oResponse) {
     console.log(`[Panel] received:`);
@@ -98,11 +116,11 @@
     console.log(error);
 }
 
 function sendMessageAndWaitResponse (oData) {
     let xPromise = browser.runtime.sendMessage(oData);
-    xPromise.then(handleResponse, handleError);  
+    xPromise.then(handleResponse, handleError);
 }
 
 
 /*
     Messages received
@@ -156,36 +174,10 @@
 
 function showTestResult (sText) {
     document.getElementById("tests_result").textContent = sText;
 }
 
-function openConjugueurTab () {
-    if (bChrome) {
-        browser.tabs.create({
-            url: browser.extension.getURL("panel/conjugueur.html")
-        });
-        return;
-    }
-    let xConjTab = browser.tabs.create({
-        url: browser.extension.getURL("panel/conjugueur.html")
-    });
-    xConjTab.then(onCreated, onError);
-}
-
-function openConjugueurTab () {
-    if (bChrome) {
-        browser.tabs.create({
-            url: browser.extension.getURL("panel/conjugueur.html")
-        });
-        return;
-    }
-    let xConjTab = browser.tabs.create({
-        url: browser.extension.getURL("panel/conjugueur.html")
-    });
-    xConjTab.then(onCreated, onError);
-}
-
 
 /*
     UI options
 */
 function displayUIOptionsLoadedFromStorage () {
@@ -235,18 +227,18 @@
         console.log("no sc options found");
         return;
     }
     dOptions = dOptions.sc_options;
     //document.getElementById("extended_dic").checked = dOptions.extended_dic;
-    //document.getElementById("community_dic").checked = dOptions.community_dic;
+    document.getElementById("community_dic").checked = dOptions.community_dic;
     document.getElementById("personal_dic").checked = dOptions.personal;
 }
 
 function storeSCOptions () {
     browser.storage.local.set({"sc_options": {
         extended: false,
-        community: false,
+        community: document.getElementById("community_dic").checked,
         personal: document.getElementById("personal_dic").checked
     }});
 }