Examine source code of killer tomato attack

{
  "theme": {
    "images": {
      "theme_frame": "tomatotop.jpg"
    },
    "colors": {
      "frame": "#050400",
      "tab_background_text": "#fcb103"
    }
  },
  "version": "2.0",
  "name": "killer tomato attack",
  "manifest_version": 2,
  "description": "from my garden"
}