Examine source code of F Off

{
  "manifest_version": 2,
  "name": "F Off",
  "version": "0.1",
  "version_name": "0.1 pepper spray",
  "description": "Pepper spray for attention span rapists. Hides Twitter Promoted Posts, Promoted Account recommendations, and Random Tweets from Accounts followed by Accounts you follow.",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "jquery.js",
        "fuckoff.js"
      ]
    }
  ],
  "icons": {
    "48": "iconx48.png",
    "96": "iconx96.png"
  },
  "developer": {
    "name": "Jacob North",
    "url": "http://firststudio.co"
  }
}