Examine source code of Johnny Kobra EP theme 2

{
  "theme": {
    "images": {
      "theme_frame": "JK-EP-2-Firefox-Theme-header.png"
    },
    "colors": {
      "frame": "#333300",
      "tab_background_text": "#66cccc"
    }
  },
  "version": "2.0",
  "name": "Johnny Kobra EP theme 2",
  "manifest_version": 2,
  "description": "this is the second theme for the Johnny Kobra EP"
}