Examine source code of oldify-reddit

{
  "manifest_version": 2,
  "name": "oldify-reddit",
  "version": "1.0",
  "description": "Redirects to old.* version of reddit.",
  "icons": {
    "48": "icons/R-48.png",
    "96": "icons/R-96.png"
  },
  "background": {
    "scripts": [
      "redirector.js"
    ]
  },
  "permissions": [
    "webRequest",
    "*://www.reddit.com/*",
    "*://new.reddit.com/*",
    "webRequestBlocking"
  ]
}