Examine source code of Headblends

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0A0082",
      "tab_background_text": "#FFFF00"
    }
  },
  "version": "2.0",
  "name": "Headblends",
  "manifest_version": 2,
  "description": "An unobtrusive artistic Firefox and Waterfox theme for Headblends fans. Show your support with this visually pleasant chill music skin."
}