Examine source code of San Fransisco

{
  "name": "San Fransisco",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SanFransiscoH.jpg"
    },
    "colors": {
      "frame": "rgba(43, 1, 1, 0)",
      "tab_background_text": "rgba(245, 255, 56, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(250, 250, 55, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b9b10f2-c4b8-4612-a7a9-b8ee0144f7df}"
    }
  }
}