Examine source code of Hoarder

{
  "manifest_version": 3,
  "name": "Hoarder",
  "description": "An extension to bookmark links to hoarder.app",
  "version": "1.2.3",
  "icons": {
    "16": "public/logo-16.png",
    "48": "public/logo-48.png",
    "128": "public/logo-128.png"
  },
  "action": {
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "service-worker-loader.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "index.html#options",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@hoarder.app"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus"
  ]
}