Examine source code of Deep Green Forest

{
  "name": "Deep Green Forest",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "xianyu-hao-bKqRM346Kks-unsplash.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(24, 87, 28, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e97c52e2-4dc2-4951-8259-05a99314cb05}"
    }
  }
}