Examine source code of Spin CRM

{
  "browser_specific_settings": {
    "gecko": {
      "id": "spin@i22.in"
    }
  },
  "name": "Spin CRM",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Spin CRM - Chrome Extension for lead capture",
  "author": "spin@i22.in",
  "content_scripts": [
    {
      "matches": [
        "https://*.linkedin.com/*",
        "*://*.linkedin.com/*"
      ],
      "js": [
        "scripts/jquery.js",
        "scripts/content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Spin CRM",
    "default_icon": {
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "storage",
    "https://*.linkedin.com/[a-z0-9]*",
    "*://*.linkedin.com/[a-z0-9]*",
    "https://*.googleapis.com/*"
  ],
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}