Examine source code of Hide Facebook Ad Column

{
  "manifest_version": 2,
  "name": "Facebook Hide Ad Column",
  "version": "1.1resigned1",
  "description": "Attempts to hide Facebook's horrific ad column to the right of the news feed.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "Hide Facebook Ad Column.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e5429d7e-4708-40d8-bda6-1a2fca5b72f9}"
    }
  }
}