Examine source code of restfirman

{
  "name": "restfirman",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "IMG_2116.JPG"
    },
    "colors": {
      "frame": "rgba(232, 235, 235, 1)",
      "tab_background_text": "rgba(91, 46, 194, 1)",
      "toolbar": "rgba(0, 0, 0, 0.84)",
      "bookmark_text": "rgba(179, 30, 30, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.89)",
      "toolbar_field_text": "rgba(235, 61, 61, 1)",
      "tab_line": "rgba(184, 63, 63, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{210217dd-9814-4e7c-ab2c-b557d2f69599}"
    }
  }
}