Examine source code of Electric sparks

{
  "theme": {
    "images": {
      "theme_frame": "sparkshead.jpg"
    },
    "colors": {
      "frame": "#ab9595",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Electric sparks",
  "manifest_version": 2,
  "description": "Electric fun cool sparks to brighten up a dark Firefox header. Bright over dark. Black. Rainbow sparks. Sparks. Electricity. Lines. Abstract."
}