Examine source code of Black Bird Manga

{
  "theme": {
    "images": {
      "theme_frame": "BlackBirdPersonacopy.jpg"
    },
    "colors": {
      "frame": "#dedede",
      "tab_background_text": "#fcd7cf"
    }
  },
  "version": "2.0",
  "name": "Black Bird Manga",
  "manifest_version": 2,
  "description": "Black Bird is a Japanese supernatural shōjo manga written and illustrated by Kanoko Sakurakoji.\n\nPeach Branches - watercolor fruit by Gretchen Kelly"
}