Examine source code of GoonTools

{
  "manifest_version": 2,
  "name": "GoonTools",
  "version": "0.1",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "goontools@hilbo.zone"
    }
  },
  "description": "Toolkit for the SomethingAwful Forums",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/32.png",
    "default_title": "GoonTools",
    "default_popup": "popup/goontools.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://forums.somethingawful.com/*"
      ],
      "js": [
        "goontools.js"
      ]
    }
  ]
}