Examine source code of Casually Walking

{
  "theme": {
    "images": {
      "theme_frame": "gate7_1.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Casually Walking",
  "manifest_version": 2,
  "description": "Hana, Takamoto Chikahito, Tachibana, and Sakura from GATE7. Illustration by CLAMP."
}