Examine source code of Nimble Smart Contacts

{
  "name": "Nimble Prospector",
  "version": "23.3.15.1442",
  "description": "Lead Capture, Data Discovery, and CRM that works on every web page",
  "homepage_url": "https://nimble.com",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "applications": {
    "gecko": {
      "id": "jid1-sNAVm96QYW0iBg@jetpack",
      "strict_min_version": "67.0"
    }
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/icon.png",
      "38": "icons/icon.png"
    },
    "default_title": "Nimble Prospector"
  },
  "icons": {
    "128": "icons/icon.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "options_ui": {
    "chrome_style": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*",
        "*://*.twitter.com/*",
        "*://*.instagram.com/*",
        "*://*.angel.co/*",
        "*://*.crunchbase.com/*",
        "*://*.google.com/mail/*",
        "*://*.google.com/calendar/*",
        "*://app.intercom.io/*",
        "*://app.intercom.com/*",
        "*://*.klout.com/*",
        "*://*.salesforce.com/*",
        "*://*.pitneybowes.com/*",
        "*://*.office.com/*",
        "*://*.office365.com/*",
        "*://*.live.com/*",
        "*://*.dynamics.com/*",
        "*://web.skype.com/*",
        "*://employers.indeed.com/*",
        "*://*.linkedin.com/*"
      ],
      "js": [
        "jquery.js",
        "common.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    },
    {
      "all_frames": true,
      "matches": [
        "*://addons.gsuite.google.com/*"
      ],
      "js": [
        "gmail-addon-agent.js"
      ]
    },
    {
      "all_frames": true,
      "matches": [
        "*://*.nimble.com/app/prospector-agent/*",
        "*://*.devnimble.com/app/prospector-agent/*",
        "*://*.dev.nimble.com/app/prospector-agent/*"
      ],
      "js": [
        "nimble-agent.js"
      ]
    },
    {
      "all_frames": true,
      "matches": [
        "*://*.nimble.com/app/widget/*",
        "*://*.devnimble.com/app/widget/*",
        "*://*.dev.nimble.com/app/widget/*"
      ],
      "js": [
        "open-prospector.js"
      ]
    },
    {
      "matches": [
        "*://twitter.com/*"
      ],
      "js": [
        "twitter.js"
      ],
      "css": [
        "twitter.css"
      ]
    },
    {
      "matches": [
        "*://mail.google.com/*"
      ],
      "js": [
        "inboxsdk.js",
        "gmail.js"
      ],
      "css": [
        "gmail.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "frame.html",
    "nimble-agent-frame.html",
    "icons/close-24px.svg",
    "icons/create-white-18dp.svg",
    "icons/swap_vert-white-18dp.svg",
    "icons/nimble-logo.svg",
    "icons/icon.png"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ]
  }
}