Examine source code of Chibi Owls

{
  "name": "Chibi Owls",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Chibi Owls.png"
    },
    "colors": {
      "frame": "rgba(8, 31, 47, 1)",
      "tab_background_text": "rgba(237, 253, 255, 1)",
      "toolbar": "rgba(8, 31, 48, 0)",
      "bookmark_text": "rgba(229, 253, 255, 1)",
      "toolbar_field": "rgba(8, 31, 48, 0)",
      "toolbar_field_text": "rgba(35, 164, 227, 1)",
      "tab_line": "rgba(35, 164, 227, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{491e8cf1-7280-4820-ba2c-17feb4f593de}"
    }
  }
}