Examine source code of Smooth Bark

{
  "name": "Smooth Bark",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "New Piskel-1.png(1).png"
    },
    "colors": {
      "frame": "rgba(47, 43, 37, 1)",
      "tab_background_text": "rgba(71, 65, 53, 1)",
      "toolbar": "rgba(97, 88, 74, 1)",
      "bookmark_text": "rgba(71, 65, 53, 1)",
      "toolbar_field": "rgba(112, 104, 85, 1)",
      "toolbar_field_text": "rgba(71, 65, 53, 1)",
      "tab_line": "rgba(107, 89, 58, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{934a8ea7-e7da-4892-8c9a-0ccbb4dc8d9f}"
    }
  }
}