Examine source code of netelip Dialer Extension for Pipedrive

{
  "name": "netelip Dialer Extension for Pipedrive",
  "version": "1.1",
  "description": "netelip Dialer Extension for Pipedrive",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    },
    "default_title": "netelip Dialer Extension for Pipedrive",
    "default_popup": "dialer.html"
  },
  "web_accessible_resources": [
    "bootstrap.min.css",
    "icon.png",
    "login.css",
    "font-awesome.css",
    "dialer.html"
  ],
  "content_scripts": [
    {
      "js": [
        "jquery.js",
        "content.js",
        "content.js"
      ],
      "matches": [
        "https://*.pipedrive.com/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "jquery.js",
      "background.js"
    ],
    "persistent": true
  },
  "applications": {
    "gecko": {
      "id": "netelipExtensionForPipedrive@netelip"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "optional_permissions": [
    "notifications"
  ],
  "permissions": [
    "storage",
    "contextMenus",
    "alarms",
    "https://*.pipedrive.com/*"
  ]
}