Examine source code of Bookmark Branch Porter

{
  "author": "igorlogius",
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{ace7819a-7559-40bc-82be-86782b19bc90}"
    }
  },
  "homepage_url": "https://github.com/igorlogius/webextensions/tree/main/sources/bookmark-branch-porter",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_area": "navbar"
  },
  "icons": {
    "128": "icon.png"
  },
  "manifest_version": 2,
  "description": "Import or Export a branch of your bookmark tree as JSON or HTML",
  "name": "Bookmark Branch Porter",
  "options_ui": {
    "open_in_tab": true,
    "page": "port.html"
  },
  "permissions": [
    "bookmarks"
  ],
  "version": "1.5.26"
}