Examine source code of BTACD+

{
  "manifest_version": 2,
  "name": "BTACD+",
  "version": "1.0",
  "description": "An extension aimed at improving your experience on By Tooth and Claw Dragons.",
  "icons": {
    "16": "icons/16.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://forums.btacdragons.com/*",
        "http://btacdragons.jcink.net/*",
        "http://btacdragons.jfbs.net/*"
      ],
      "js": [
        "redirect.js"
      ]
    },
    {
      "run_at": "document_end",
      "matches": [
        "*://forums.btacdragons.com/*",
        "*://btacdragons.jcink.net/*",
        "*://btacdragons.jfbs.net/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}