Examine source code of Housepets

{
  "theme": {
    "images": {
      "theme_frame": "persona.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Housepets",
  "manifest_version": 2,
  "description": "Housepets web comic by Rick Griffin."
}