Examine source code of Danger Mouse

{
  "theme": {
    "images": {
      "theme_frame": "dm-header.jpg"
    },
    "colors": {
      "frame": "#1db0d1",
      "tab_background_text": "#ea291a"
    }
  },
  "version": "2.0",
  "name": "Danger Mouse",
  "manifest_version": 2,
  "description": "Danger Mouse is a mouse who works as a superhero/secret agent with his faithful assistant Penfold."
}