Examine source code of Rivets and Grooves

{
  "name": "Rivets and Grooves",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "rivets.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d65cae66-7861-4f5f-8daf-2975c2d2bae3}"
    }
  }
}