Examine source code of ihavecake

{
  "theme": {
    "images": {
      "theme_frame": "getpersonacake12.jpg"
    },
    "colors": {
      "frame": "#555454",
      "tab_background_text": "#c20b0b"
    }
  },
  "version": "2.0",
  "name": "ihavecake",
  "manifest_version": 2,
  "description": "Happy Cakeface. I think cake makes everyone happy in the face."
}