Examine source code of Reddit URL Cleaner

{
  "manifest_version": 2,
  "name": "Reddit URL Cleaner",
  "version": "1.0",
  "description": "Removes '?tl=xx' from Reddit URLs.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "*://*.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d19e6956-7be5-45a6-a205-661655cfd3bf}"
    }
  }
}