Examine source code of Old New Reddit Redirect

{
  "name": "Old New Reddit Redirect",
  "description": "Ensure Reddit always loads the old-new design",
  "version": "1.8.0.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://new.reddit.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://reddit.com/*",
    "*://www.reddit.com/*",
    "*://np.reddit.com/*",
    "*://amp.reddit.com/*",
    "*://i.reddit.com/*",
    "*://i.redd.it/*",
    "*://preview.redd.it/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e73220a-76bc-4c89-8bc6-20f6737d88aa}"
    }
  }
}