Examine source code of Steam Popularity FIlter

{
  "manifest_version": 2,
  "name": "Steam Search Popularity FIlter",
  "version": "2resigned1",
  "description": "Gives the ability to filter search results based on popularity of games.",
  "content_scripts": [
    {
      "js": [
        "popularity_filter.js"
      ],
      "css": [
        "style.css"
      ],
      "matches": [
        "http://store.steampowered.com/search/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{367084e0-e55e-4b5f-b120-8856c45ac3ae}"
    }
  }
}