Examine source code of Bookmark Manager v6

{
  "manifest_version": 2,
  "name": "Bookmark Manager",
  "version": "1.0",
  "description": "Manage your bookmarks with ease.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "permissions": [
    "bookmarks"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa206686-43c7-42e5-8ec1-d0d74080204b}"
    }
  }
}