Examine source code of UberPlonker

{
  "manifest_version": 2,
  "name": "UberPlonker",
  "version": "0.0.2",
  "description": "Completely hide plonked users on 3Playa.",
  "content_scripts": [
    {
      "js": [
        "content.js",
        "jquery-3.2.1.min.js"
      ],
      "matches": [
        "*://bbs.3playa.com/*",
        "*://www.bbs.3playa.com/*"
      ]
    }
  ]
}