Examine source code of Manga Ariel

{
  "name": "Manga Ariel",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Manga Ariel.png"
    },
    "colors": {
      "frame": "rgba(24, 83, 183, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(24, 80, 184, 0)",
      "toolbar_field": "rgba(24, 80, 184, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b388815-9efe-46ff-abf8-85dfb5a214bb}"
    }
  }
}