Index: gc_lang/fr/webext/content_scripts/init.js
==================================================================
--- gc_lang/fr/webext/content_scripts/init.js
+++ gc_lang/fr/webext/content_scripts/init.js
@@ -44,10 +44,18 @@
     lMenu: [],
 
     oTFPanel: null,
     oLxgPanel: null,
     oGCPanel: null,
+
+    xRightClickedNode: null,
+
+    listenRightClick: function () {
+        document.addEventListener('contextmenu', function (xEvent) {
+            this.xRightClickedNode = xEvent.target;
+        }.bind(this), true);
+    },
 
     createMenus: function () {
         let lNode = document.getElementsByTagName("textarea");
         for (let xNode of lNode) {
             if (xNode.style.display !== "none" && xNode.style.visibility !== "hidden") {
@@ -141,14 +149,10 @@
 
 /*
     Node where a right click is done
     Bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1325814
 */
-let xRightClickedNode = null;
-document.addEventListener('contextmenu', function (xEvent) {
-    xRightClickedNode = xEvent.target;
-}, true);
 
 
 /*
     Connexion to the background
 */
@@ -182,16 +186,16 @@
             Commands received from the context menu
             (Context menu are initialized in background)
         */
         // Grammar checker commands
         case "rightClickGCEditableNode":
-            oGrammalecte.startGCPanel(xRightClickedNode);
-            sText = (xRightClickedNode.tagName == "TEXTAREA") ? xRightClickedNode.value : xRightClickedNode.textContent;
+            oGrammalecte.startGCPanel(oGrammalecte.xRightClickedNode);
+            sText = (oGrammalecte.xRightClickedNode.tagName == "TEXTAREA") ? oGrammalecte.xRightClickedNode.value : oGrammalecte.xRightClickedNode.textContent;
             xGrammalectePort.postMessage({
                 sCommand: "parseAndSpellcheck",
                 dParam: {sText: sText, sCountry: "FR", bDebug: false, bContext: false},
-                dInfo: {sTextAreaId: xRightClickedNode.id}
+                dInfo: {sTextAreaId: oGrammalecte.xRightClickedNode.id}
             });
             break;
         case "rightClickGCPage":
             oGrammalecte.startGCPanel();
             xGrammalectePort.postMessage({
@@ -205,15 +209,15 @@
             // selected text is sent to the GC worker in the background script.
             break;
         // Lexicographer commands
         case "rightClickLxgEditableNode":
             oGrammalecte.startLxgPanel();
-            sText = (xRightClickedNode.tagName == "TEXTAREA") ? xRightClickedNode.value : xRightClickedNode.textContent;
+            sText = (oGrammalecte.xRightClickedNode.tagName == "TEXTAREA") ? oGrammalecte.xRightClickedNode.value : oGrammalecte.xRightClickedNode.textContent;
             xGrammalectePort.postMessage({
                 sCommand: "getListOfTokens",
                 dParam: {sText: sText},
-                dInfo: {sTextAreaId: xRightClickedNode.id}
+                dInfo: {sTextAreaId: oGrammalecte.xRightClickedNode.id}
             });
             break;
         case "rightClickLxgPage":
             oGrammalecte.startLxgPanel();
             xGrammalectePort.postMessage({
@@ -237,7 +241,8 @@
 
 
 /*
     Start
 */
+oGrammalecte.listenRightClick();
 oGrammalecte.createMenus();
 oGrammalecte.createMenus2();