Examine source code of Red Head by M♥Donna

{
  "name": "Red Head by M♥Donna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "RedHead3.jpg"
    },
    "colors": {
      "frame": "rgba(102, 117, 183, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(103, 115, 184, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(103, 115, 184, 0.09)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{42031989-65da-4fed-8b51-7a51241a729b}"
    }
  }
}