Examine source code of Kirby Rainbow

{
  "name": "Kirby-Rainbow",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Kirby_Firefox.png"
    },
    "colors": {
      "frame": "rgba(52, 50, 119, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(255, 162, 222, 1)",
      "tab_line": "rgba(255, 24, 132, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{04c78a44-d324-4bb0-b86e-ee26c09e7a30}"
    }
  }
}