Examine source code of Hopeful Horizons

{
  "name": "Hopeful Horizons",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Hopeful-Horizons.png"
    },
    "colors": {
      "frame": "rgba(41, 32, 176, 1)",
      "tab_background_text": "rgba(39, 33, 219, 1)",
      "toolbar": "rgba(75, 179, 115, 1)",
      "bookmark_text": "rgba(217, 165, 74, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f6e297e-8e43-48e1-8e3b-c50a03d6ac83}"
    }
  }
}