Examine source code of Enshittifier — Dead Internet companion

{
  "manifest_version": 3,
  "name": "Enshittifier — Dead Internet companion",
  "version": "1.0.0",
  "description": "Replace AI with 💩 (or anything else) on every page. Skip the sites you'd rather not see it on.",
  "homepage_url": "https://wells.ee",
  "browser_specific_settings": {
    "gecko": {
      "id": "enshittifier@firefox.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_origin_as_fallback": true
    }
  ]
}