Fixing typo in name of "Mozzilla" Firefox (#7463)

i18n/en.json

@@ -6725,7 +6725,7 @@
   },
   {
     "id": "web.error.unsupported_browser.help2",
-    "translation": "Mozzilla Firefox 52+"
+    "translation": "Mozilla Firefox 52+"
   },
   {
     "id": "web.error.unsupported_browser.help3",