Examine source code of Free Source Trifecta

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2e1c06",
      "tab_background_text": "#f2e9df"
    }
  },
  "version": "2.0",
  "name": "Free Source Trifecta",
  "manifest_version": 2,
  "description": "This theme features three logos that represent freeware: the Linux Penguin, the Gimp Fox, and Firefox logos."
}