Examine source code of FastReader

{
  "manifest_version": 2,
  "name": "FastReader",
  "version": "2.1",
  "description": "A tool that enables humans to achieve great reading speeds",
  "icons": {
    "48": "icons/logo48.png",
    "96": "icons/logo96.png"
  },
  "browser_action": {
    "default_icon": "icons/logo48.png",
    "default_title": "FastReader",
    "default_popup": "choose_speed.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "fastreader.js",
        "jquery.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ]
}