Examine source code of moon bunnies

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f27edb",
      "tab_background_text": "#3e2540"
    }
  },
  "version": "2.0",
  "name": "moon bunnies",
  "manifest_version": 2,
  "description": "based on usagi's theme from sailor moon"
}