Examine source code of Read and Scroll

{
  "manifest_version": 2,
  "name": "Read and Scroll",
  "description": "An extension that adds a reader mode and auto-scroll to any website in Chrome.",
  "version": "2.1.0",
  "short_name": "ReadScroll",
  "icons": {
    "16": "icon/rs-16.png",
    "32": "icon/rs-32.png",
    "48": "icon/rs-48.png",
    "64": "icon/rs-64.png",
    "128": "icon/rs-128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon/rs-16.png",
      "32": "icon/rs-32.png",
      "48": "icon/rs-48.png",
      "64": "icon/rs-64.png",
      "128": "icon/rs-128.png"
    },
    "default_title": "Read and Scroll Popup",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "icon/rs-16.png",
    "icon/rs-32.png",
    "icon/rs-48.png",
    "icon/rs-64.png",
    "icon/rs-128.png"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9d2a3ceb-a936-41a1-a6d9-08c5ac5b7795}"
    }
  }
}