Examine source code of SnowMobile

{
  "manifest_version": 2,
  "name": "SnowMobile",
  "version": "1.2resigned1",
  "description": "Make the Snowheads.com forum mobile-friendly",
  "icons": {
    "48": "icons/ski-goggles.svg",
    "96": "icons/ski-goggles.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://snowheads.com/",
        "*://snowheads.com/index.php*",
        "*://snowheads.com/mx/index.php*"
      ],
      "css": [
        "css/start.css"
      ]
    },
    {
      "matches": [
        "*://snowheads.com/ski-forum/viewforum.php*",
        "*://snowheads.com/ski-forum/snow_reports.php*"
      ],
      "css": [
        "css/viewforum.css"
      ]
    },
    {
      "matches": [
        "*://snowheads.com/ski-forum/",
        "*://snowheads.com/ski-forum/index.php*",
        "*://snowheads.com/ski-forum/?*"
      ],
      "css": [
        "css/forumlist.css"
      ]
    },
    {
      "matches": [
        "*://snowheads.com/ski-forum/viewtopic.php*"
      ],
      "css": [
        "css/viewtopic.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0a9af6ad-2c27-41b2-9dfb-e87d6198cfc9}"
    }
  }
}