Examine source code of Snap Scroll

{
  "manifest_version": 2,
  "name": "Snap Scroll",
  "short_name": "Snap Scroll",
  "description": "Delightfully fast and precise scrolling via point and click.",
  "version": "2.2.0",
  "author": "Steven Meliopoulos",
  "icons": {
    "128": "img/icon_128.png"
  },
  "browser_action": {
    "default_title": "Snap Scroll",
    "default_icon": {
      "16": "img/action_icon_enabled_16.png",
      "24": "img/action_icon_enabled_24.png",
      "32": "img/action_icon_enabled_32.png"
    },
    "default_popup": "popup_main.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "shared.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "shared.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{62b3bff8-489b-4c93-bc57-6e892aa455d9}"
    }
  }
}