Examine source code of dead crows

{
  "theme": {
    "images": {
      "theme_frame": "crow.jpg"
    },
    "colors": {
      "frame": "#072b0b",
      "tab_background_text": "#0c7d04"
    }
  },
  "version": "2.0",
  "name": "dead crows",
  "manifest_version": 2,
  "description": "crows"
}