Examine source code of teddit.net

{
  "name": "teddit",
  "description": "Use teddit instead of Reddit.",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "256": "teddit.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.reddit.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{504a980a-2ac7-4bed-8b78-c9571cbea605}"
    }
  }
}