Examine source code of Epic flames

{
  "theme": {
    "images": {
      "theme_frame": "firefoxpersona.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#c42f2f"
    }
  },
  "version": "2.0",
  "name": "Epic flames",
  "manifest_version": 2,
  "description": "Epic flames! ----made in gimp"
}