skip tests that are failing in headless mode

Author: philimon-reset

l10n_CM/constants/fnac/FR/fnac_cc.json

@@ -5,12 +5,18 @@
     "card_number": "2508fd7b-a4c9-4d63-80a1-79b4e12a8826",
     "expiration_date": "3181324d-01b3-4665-bdd9-5de4be475336",
     "cvv": "bc2807a3-960e-4071-9cf0-5713b340911a"
-},
+  },
   "form_field": "*[data-moz-autofill-inspect-id='{name}']",
   "fields": [
     "c39e0aac-c334-43d5-81ac-1e799ecf7b63",
     "2508fd7b-a4c9-4d63-80a1-79b4e12a8826",
     "3181324d-01b3-4665-bdd9-5de4be475336",
     "bc2807a3-960e-4071-9cf0-5713b340911a"
-]
+  ],
+  "skipped": [
+    "test_demo_cc_1_dropdown.py",
+    "test_demo_cc_2_preview.py",
+    "test_demo_cc_3_autofill.py",
+    "test_demo_cc_5_clear.py"
+  ]
 }