Examine source code of Civitai Red Redirect

{
  "manifest_version": 2,
  "name": "Civitai Red Redirect",
  "description": "Redirects civitai.com URLs to civitai.red",
  "version": "0.1",
  "icons": {
    "16": "icons/icon.png",
    "32": "icons/icon.png",
    "64": "icons/icon.png",
    "128": "icons/icon.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.civitai.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "civitai-redirect@mrp",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background_script.js"
    ],
    "persistent": true
  }
}