Examine source code of Mozilka

{
  "name": "Mozilka",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "r33.jpg"
    },
    "colors": {
      "frame": "rgba(13, 13, 13, 1)",
      "tab_background_text": "rgba(148, 148, 148, 1)",
      "toolbar": "rgba(28, 28, 28, 1)",
      "bookmark_text": "rgba(148, 148, 148, 1)",
      "toolbar_field": "rgba(13, 13, 13, 1)",
      "toolbar_field_text": "rgba(148, 148, 148, 1)",
      "tab_line": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e1f801b-ae9e-4b4b-92f1-d7df5ab0218a}"
    }
  }
}