Examine source code of Redlib (Farside)

{
  "name": "Redlib",
  "description": "Use Redlib instead of Reddit.",
  "version": "4.0",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko_android": {},
    "gecko": {
      "id": "{5003e502-f361-4bf6-b09e-41a844d36d33}"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "256": "redlib.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.reddit.com/*"
  ]
}