Examine source code of RedditSnoop

{
  "manifest_version": 2,
  "name": "Snoop",
  "version": "0.0.3resigned1",
  "description": "Peek into redditor's post history",
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/r/*/comments/*"
      ],
      "js": [
        "snoop.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/snoop-48.png",
    "96": "icons/snoop-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{62f916aa-77b3-4dde-9899-7a87f389ac7a}"
    }
  }
}