Examine source code of History Export

{
  "manifest_version": 2,
  "name": "History Export",
  "version": "0.6",
  "icons": {
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "history"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ce0db577-2723-471c-9ed7-440d83e793e0}"
    }
  }
}