fix: add data_collection_permissions for Firefox Add-ons compliance

Firefox Add-ons now requires all new extensions submitted after November 3, 2025
to declare data collection practices in manifest.json. This extension does not
collect or transmit any user data, so we explicitly set data_collection_permissions
to "none" in the browser_specific_settings.gecko section to comply with the new policy.

Author: yamadashy

app/manifest.json

@@ -61,7 +61,10 @@
   "__firefox__browser_specific_settings": {
     "gecko": {
       "id": "{8c3f4a7d-9e2b-4f1c-a5d6-7b8e9f0a1c2d}",
-      "strict_min_version": "102.0"
+      "strict_min_version": "102.0",
+      "data_collection_permissions": {
+        "required": ["none"]
+      }
     }
   }
 }