Examine source code of Fox Sphere

{
  "name": "Fox Sphere",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "firefox-3.png"
    },
    "colors": {
      "frame": "rgba(9, 234, 242, 0.61)",
      "tab_background_text": "rgba(240, 240, 240, 0.82)",
      "toolbar": "rgba(30, 152, 166, 0.11)",
      "bookmark_text": "rgba(240, 240, 240, 1)",
      "toolbar_field": "rgba(189, 108, 27, 0.2)",
      "toolbar_field_text": "rgba(245, 245, 245, 1)",
      "tab_line": "rgba(240, 98, 26, 0.43)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{693d6bf9-d700-4baa-86b9-c4bf65981e0f}"
    }
  }
}