Examine source code of Microformats Reader

{
  "manifest_version": 3,
  "name": "__MSG_extension_name__",
  "version": "1.0.280",
  "description": "__MSG_extension_description__",
  "author": "Michael Beaton",
  "icons": {
    "16": "icon/muted-16.png",
    "32": "icon/muted-32.png",
    "48": "icon/muted-48.png",
    "128": "icon/muted-128.png"
  },
  "default_locale": "en_GB",
  "permissions": [
    "tabs",
    "storage"
  ],
  "action": {
    "default_title": "__MSG_popup_title__",
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "homepage_url": "https://beatonma.org/app/microformats-reader/",
  "browser_specific_settings": {
    "gecko": {
      "id": "microformats-reader@beatonma.org"
    }
  }
}