Examine source code of bbcoder for RpNation

{
  "manifest_version": 2,
  "name": "bbcoder for RpNation",
  "short_name": "bbcoder",
  "author": "Lyrositor",
  "description": "Extension for RpNation which adds an enhanced BBCode/BBXML editor",
  "homepage_url": "https://github.com/Lyrositor/bbcoder",
  "version": "0.3resigned1",
  "icons": {
    "512": "images/bbcoder.png"
  },
  "permissions": [
    "activeTab",
    "https://www.rpnation.com/",
    "https://www.lyros.net/"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.rpnation.com/forums/*",
        "https://www.rpnation.com/threads/*",
        "https://www.rpnation.com/posts/*",
        "https://www.rpnation.com/conversations/*"
      ],
      "css": [
        "lib/codemirror.css",
        "content.css"
      ],
      "js": [
        "lib/jquery-3.2.1.min.js",
        "lib/codemirror.js",
        "lib/closebrackets.js",
        "lib/closetag.js",
        "lib/css.js",
        "lib/matchbrackets.js",
        "lib/matchtags.js",
        "lib/multiplex.js",
        "lib/xml.js",
        "lib/xml-fold.js",
        "bbcode.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b33e6f6-7169-4627-9190-e4d9fffed506}"
    }
  }
}