Index: gc_lang/fr/build.py
==================================================================
--- gc_lang/fr/build.py
+++ gc_lang/fr/build.py
@@ -51,14 +51,18 @@
     for spf in ["LICENSE.txt", "LICENSE.fr.txt"]:
         hZip.write(spf)
     dVars = _createOptionsForThunderbird(dVars)
     helpers.addFolderToZipAndFileFile(hZip, "gc_lang/"+sLang+"/mailext", "", dVars, True)
     hZip.close()
-    spExtension = dVars['win_tb_debug_extension_path']  if platform.system() == "Windows"  else dVars['linux_tb_debug_extension_path']
-    file_util.copy_file(spfZip, spExtension + "/" + dVars['tb_identifier']+ ".xpi")  # Filename for TB is just <identifier.xpi>
-    spExtension = dVars['win_tb_beta_extension_path']  if platform.system() == "Windows"  else dVars['linux_tb_beta_extension_path']
-    file_util.copy_file(spfZip, spExtension + "/" + dVars['tb_identifier']+ ".xpi")  # Filename for TB is just <identifier.xpi>
+    #spExtension = dVars['win_tb_debug_extension_path']  if platform.system() == "Windows"  else dVars['linux_tb_debug_extension_path']
+    #if os.path.isdir(spExtension):
+    #    file_util.copy_file(spfZip, spExtension + "/" + dVars['tb_identifier']+ ".xpi")  # Filename for TB is just <identifier.xpi>
+    #    print(f"TB extension copied in <{spExtension}>")
+    #spExtension = dVars['win_tb_beta_extension_path']  if platform.system() == "Windows"  else dVars['linux_tb_beta_extension_path']
+    #if os.path.isdir(spExtension):
+    #    print(f"TB extension copied in <{spExtension}>")
+    #    file_util.copy_file(spfZip, spExtension + "/" + dVars['tb_identifier']+ ".xpi")  # Filename for TB is just <identifier.xpi>
 
 
 def _createOptionsForThunderbird (dVars):
     dVars['sXULTabs'] = ""
     dVars['sXULTabPanels'] = ""

Index: gc_lang/fr/config.ini
==================================================================
--- gc_lang/fr/config.ini
+++ gc_lang/fr/config.ini
@@ -57,10 +57,11 @@
 tb_name = Grammalecte [fr]
 win_tb_path = C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe
 win_tb_beta_path = C:\Program Files\Thunderbird Daily\thunderbird.exe
 linux_tb_path = /usr/bin/thunderbird
 linux_tb_beta_path = /usr/bin/thunderbird
+# useless now
 win_tb_debug_extension_path = D:\_temp\tb-debug.profile\extensions
 linux_tb_debug_extension_path = ~/tb-debug.profile/extensions
 win_tb_beta_extension_path = D:\_temp\tb-beta.profile\extensions
 linux_tb_beta_extension_path = ~/tb-beta.profile/extensions
 # Set Thunderbird folder in your PATH variable