Examine source code of Fearless in Devotion (Fan Made)

{
  "manifest_version": 3,
  "name": "Fearless in Devotion (Fan Made)",
  "version": "0.1.0",
  "description": "Fan-made companion for the Fearless in Devotion Wrexham AFC podcast: episodes, newsletter and news in your sidebar. Built independently by a fan, not an official FiD, Wrexham AFC, or Mozilla product.",
  "browser_specific_settings": {
    "gecko": {
      "id": "fearless-in-devotion@fidpodcast.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "sidebar_action": {
    "default_title": "Fearless in Devotion",
    "default_panel": "sidebar/index.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "storage",
    "theme"
  ],
  "host_permissions": [
    "https://feeds.acast.com/*",
    "https://wrexhamisthegame.substack.com/*",
    "https://feeds.bbci.co.uk/*"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; connect-src 'self' https://feeds.acast.com https://wrexhamisthegame.substack.com https://feeds.bbci.co.uk; media-src 'self' https://*.acast.com"
  }
}