Examine source code of BOOKMARKS-SAVE-CSV

{
  "manifest_version": 2,
  "name": "BOOKMARKS-SAVE-CSV",
  "version": "0.2",
  "description": "Save/Export bookmarks into csv file format or text format (all or branches)",
  "author": "acendrou",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "bookmarks",
    "contextMenus",
    "downloads"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmarks-save-csv@ekvidi",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}