Examine source code of BookmarksToSources

{
  "manifest_version": 2,
  "name": "BookmarksToSources",
  "version": "1.0.0",
  "description": "Generate a research sources document from your bookmarks!",
  "permissions": [
    "bookmarks",
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {},
  "content_security_policy": "script-src 'self' https://code.getmdl.io/1.3.0/material.min.js https://cdn.jsdelivr.net/npm/treeselectjs@0.12.2/dist/treeselectjs.umd.js https://unpkg.com/docx@7.1.0/build/index.js https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.8/FileSaver.js; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f382d47-59bb-49cd-9b1f-526840a0f4c1}"
    }
  }
}