Examine source code of WordTotal

{
  "name": "WordTotal",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Blue.jpg"
    },
    "colors": {
      "frame": "rgba(209, 225, 255, 1)",
      "tab_background_text": "rgba(31, 77, 156, 1)",
      "toolbar": "rgba(44, 88, 163, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(40, 76, 143, 1)",
      "tab_line": "rgba(44, 88, 163, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9109921d-db6b-4130-81ee-e32308c20e8b}"
    }
  }
}