Examine source code of Whoser's Queue

{
  "manifest_version": 2,
  "name": "Whoser's Queue",
  "version": "1.0",
  "description": "Tells you if you're in winner's or loser's queue on op.gg multisearch.",
  "icons": {
    "48": "icons/league.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.op.gg/multi/*"
      ],
      "js": [
        "whosers-queue.js"
      ]
    }
  ]
}