Index: gc_lang/fr/webext/background.js
==================================================================
--- gc_lang/fr/webext/background.js
+++ gc_lang/fr/webext/background.js
@@ -116,10 +116,11 @@
                 console.log(oRequest);
                 xGCEWorker.postMessage(oRequest);
                 break;
             default:
                 console.log("[background] Unknown command: " + oRequest.sCommand);
+                console.log(oRequest);
         }
     });
     xPort.postMessage({sActionDone: "newId", result: iPortId});
 }
 

Index: gc_lang/fr/webext/content_scripts/content_modifier.js
==================================================================
--- gc_lang/fr/webext/content_scripts/content_modifier.js
+++ gc_lang/fr/webext/content_scripts/content_modifier.js
@@ -109,17 +109,17 @@
 }
 
 function createTFPanel (xTextArea) {
     console.log("Formateur de texte");
     if (oTFPanel !== null) {
-        oTFPanel.setTextArea(xTextArea);
+        oTFPanel.start(xTextArea);
         oTFPanel.show();
     } else {
         // create the panel
         oTFPanel = new GrammalecteTextFormatter("grammalecte_tf_panel", "Formateur de texte", 800, 620, false);
         oTFPanel.logInnerHTML();
-        oTFPanel.setTextArea(xTextArea);
+        oTFPanel.start(xTextArea);
         oTFPanel.insertIntoPage();
     }
 }
 
 function createLxgPanel () {

Index: gc_lang/fr/webext/content_scripts/tf_content.js
==================================================================
--- gc_lang/fr/webext/content_scripts/tf_content.js
+++ gc_lang/fr/webext/content_scripts/tf_content.js
@@ -11,14 +11,10 @@
         this.xTFNode = this._createTextFormatter();
         this.xPanelContent.appendChild(this.xTFNode);
         this.xTextArea = null;
     }
 
-    setTextArea (xTextArea) {
-        this.xTextArea = xTextArea;
-    }
-
     _createTextFormatter () {
         let xTFNode = document.createElement("div");
         try {
             // Options
             let xOptions = createNode("div", {id: "grammalecte_tf_options"});
@@ -76,11 +72,11 @@
             // Actions
             let xActions = createNode("div", {id: "grammalecte_tf_actions"});
             let xDefaultButton = createNode("div", {id: "grammalecte_tf_reset", textContent: "Par défaut", className: "grammalecte_button", style: "background-color: hsl(210, 50%, 50%)"});
             xDefaultButton.addEventListener("click", () => { this.reset(); });
             let xApplyButton = createNode("div", {id: "grammalecte_tf_apply", textContent: "Appliquer", className: "grammalecte_button", style: "background-color: hsl(180, 50%, 50%)"});
-            xApplyButton.addEventListener("click", () => { this.apply(); });
+            xApplyButton.addEventListener("click", () => { this.saveOptions(); this.apply(); });
             xActions.appendChild(xDefaultButton);
             xActions.appendChild(createNode("progress", {id: "grammalecte_tf_progressbar"}));
             xActions.appendChild(createNode("span", {id: "grammalecte_tf_time_res", textContent: "…"}));
             xActions.appendChild(xApplyButton);
             //xActions.appendChild(createNode("div", {id: "grammalecte_infomsg", textContent: "blabla"}));
@@ -179,10 +175,16 @@
 
 
     /*
         Actions
     */
+    start (xTextArea) {
+        this.xTextArea = xTextArea;
+        let xPromise = browser.storage.local.get("tf_options");
+        xPromise.then(this.setOptions.bind(this), this.reset.bind(this));
+    }
+
     switchGroup (sOptName) {
         if (document.getElementById(sOptName).checked) {
             document.getElementById(sOptName.slice(2)).style.opacity = 1;
         } else {
             document.getElementById(sOptName.slice(2)).style.opacity = 0.3;
@@ -204,30 +206,32 @@
         document.getElementById('grammalecte_tf_progressbar').value = 0;
         document.getElementById('grammalecte_tf_time_res').textContent = "";
     }
 
     setOptions (oOptions) {
-        for (let sOptName in oOptions) {
-            //console.log(sOptName + ":" + oOptions[sOptName]);
-            if (document.getElementById(sOptName) !== null) {
-                document.getElementById(sOptName).checked = oOptions[sOptName];
-                if (sOptName.startsWith("o_group_")) {
-                    switchGroup(sOptName);
-                } 
-                if (document.getElementById("res_"+sOptName) !== null) {
-                    document.getElementById("res_"+sOptName).textContent = "";
-                }
+        if (oOptions.hasOwnProperty("tf_options")) {
+            oOptions = oOptions.tf_options;
+        }
+        for (let xNode of document.getElementsByClassName("option")) {
+            //console.log(xNode.id + " > " + oOptions.hasOwnProperty(xNode.id) + ": " + oOptions[xNode.id] + " [" + xNode.dataset.default + "]");
+            xNode.checked = (oOptions.hasOwnProperty(xNode.id)) ? oOptions[xNode.id] : (xNode.dataset.default === "true");
+            if (document.getElementById("res_"+xNode.id) !== null) {
+                document.getElementById("res_"+xNode.id).textContent = "";
+            }
+            if (xNode.id.startsWith("o_group_")) {
+                this.switchGroup(xNode.id);
             }
         }
     }
 
     saveOptions () {
         let oOptions = {};
         for (let xNode of document.getElementsByClassName("option")) {
             oOptions[xNode.id] = xNode.checked;
+            console.log(xNode.id + ": " + xNode.checked);
         }
-        self.port.emit("saveOptions", JSON.stringify(oOptions));
+        browser.storage.local.set({"tf_options": oOptions});
     }
 
     apply () {
         try {
             const t0 = Date.now();

Index: gc_lang/fr/webext/manifest.json
==================================================================
--- gc_lang/fr/webext/manifest.json
+++ gc_lang/fr/webext/manifest.json
@@ -61,11 +61,12 @@
     "grammalecte/fr/tests_data.json",
     "img/logo-16.png"
   ],
   "permissions": [
     "activeTab",
-    "contextMenus"
+    "contextMenus",
+    "storage"
   ],
   "chrome_settings_overrides": {
     "search_provider": {
       "name": "Grammalecte",
       "search_url": "https://www.dicollecte.org/dictionary.php?prj=fr&lemma={searchTerms}",