Examine source code of CarbonHead

{
  "theme": {
    "images": {
      "theme_frame": "header2.png"
    },
    "colors": {
      "frame": "#878787",
      "tab_background_text": "#b80000"
    }
  },
  "version": "2.0",
  "name": "CarbonHead",
  "manifest_version": 2,
  "description": "Carbon fiber BG, Firefox emblem, Mushroomhead XX at the top left of the header, and the bottom of the logo on the footer."
}