Examine source code of N/A

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#737373",
      "tab_background_text": "#d1d1d1"
    }
  },
  "version": "2.0",
  "name": "N/A",
  "manifest_version": 2,
  "description": "Source: Pixiv 53899771.\nThis theme is designed for personal use only. \nAll rights reserved by the original illustrator."
}