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
@@ -223,10 +223,24 @@
         }
         catch (e) {
             showError(e);
         }
     },
+
+    sendTextToClipboard (sText)  {
+        // recipe from https://github.com/mdn/webextensions-examples/blob/master/context-menu-copy-link-with-types/clipboard-helper.js
+        // It doesn’t seem to work anymore
+        //console.log(sText);
+        function setClipboardData (xEvent) {
+            document.removeEventListener("copy", setClipboardData, true);
+            xEvent.stopImmediatePropagation();
+            xEvent.preventDefault();
+            xEvent.clipboardData.setData("text/plain", sText);
+        }
+        document.addEventListener("copy", setClipboardData, true);
+        document.execCommand("copy");
+    },
 
     getCaretPosition (xElement) {
         // JS awfulness again.
         // recepie from https://stackoverflow.com/questions/4811822/get-a-ranges-start-and-end-offsets-relative-to-its-parent-container
         let nCaretOffsetStart = 0;

Index: gc_lang/fr/webext/content_scripts/panel_gc.js
==================================================================
--- gc_lang/fr/webext/content_scripts/panel_gc.js
+++ gc_lang/fr/webext/content_scripts/panel_gc.js
@@ -384,22 +384,10 @@
     addMessageToGCPanel (sMessage) {
         let xNode = oGrammalecte.createNode("div", {className: "grammalecte_panel_flow_message", textContent: sMessage});
         this.xParagraphList.appendChild(xNode);
     }
 
-    _copyToClipboard (sText)  {
-        // recipe from https://github.com/mdn/webextensions-examples/blob/master/context-menu-copy-link-with-types/clipboard-helper.js
-        function setClipboardData (xEvent) {
-            document.removeEventListener("copy", setClipboardData, true);
-            xEvent.stopImmediatePropagation();
-            xEvent.preventDefault();
-            xEvent.clipboardData.setData("text/plain", sText);
-        }
-        document.addEventListener("copy", setClipboardData, true);
-        document.execCommand("copy");
-    }
-
     copyTextToClipboard () {
         this.startWaitIcon();
         try {
             let xClipboardButton = this.xParent.getElementById("grammalecte_clipboard_button");
             xClipboardButton.textContent = "⇒ presse-papiers";
@@ -407,11 +395,11 @@
             // Quand c'est dans un shadow "this.xParent.getElementsByClassName" n'existe pas.
             let xElem = this.xParent.getElementById("grammalecte_gc_panel");
             for (let xNode of xElem.getElementsByClassName("grammalecte_paragraph")) {
                 sText += xNode.textContent + "\n";
             }
-            this._copyToClipboard(sText);
+            oGrammalecte.sendTextToClipboard(sText);
             window.setTimeout(() => { xClipboardButton.textContent = "📋"; }, 2000);
         }
         catch (e) {
             showError(e);
         }