Examine source code of A graffiti corner

{
  "name": "A graffiti corner",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "A graffiti corner.jpg"
    },
    "colors": {
      "frame": "rgba(217, 143, 52, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(242, 97, 145, 1)",
      "bookmark_text": "rgba(138, 222, 167, 1)",
      "toolbar_field": "rgba(250, 178, 115, 1)",
      "toolbar_field_text": "rgba(61, 209, 38, 1)",
      "tab_line": "rgba(82, 240, 87, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ecf4d0f0-fe5d-4359-82cd-4b450e822cd6}"
    }
  }
}