simple formatting fix

manifest.json

@@ -13,9 +13,9 @@
              "128": "icons/icon128.png" },
   "permissions": ["storage"],
   "applications": {
-  "gecko": {
-    "id": "placidtab2@kylemitchell.me",
-    "strict_min_version": "57.0"
+    "gecko": {
+      "id": "placidtab2@kylemitchell.me",
+      "strict_min_version": "57.0"
+    }
   }
 }
-}