Examine source code of EnCapsulate Contact Importer

{
  "content_security_policy": "script-src 'self'; object-src 'self'; report-uri https://getencapsulate.com/big-bird;",
  "background": {
    "scripts": [
      "js/libs/jquery.min.js",
      "js/libs/URI.min.js",
      "js/libs/stackdriver-errors-concat.min.js",
      "js/stackdriver-config.js",
      "js/capsuleLI.js",
      "js/capsuleLI.config.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "js/libs/jquery.min.js",
        "js/libs/stackdriver-errors-concat.min.js",
        "js/stackdriver-config.js",
        "js/capsuleLI.config.js",
        "js/capsuleLI.UI.js",
        "js/content.js"
      ],
      "matches": [
        "https://*.linkedin.com/in/*"
      ],
      "run_at": "document_end"
    }
  ],
  "page_action": {
    "default_icon": "img/logo-128x128.png",
    "default_title": "EnCapsulate",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "web_accessible_resources": [
    "img/logo-128x128.png",
    "img/logo-48x48.png"
  ],
  "name": "EnCapsulate Contact Importer",
  "short_name": "EnCapsulate",
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "0.2.3resigned1",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz9zEoM6Go59i83RfX9tqrhKIweTt05FywTltmr/wNXwTTRZ9HS0Yh3oWJpUeSYFG13QMGnqEmJiW2GGcFo2DaOIdVqoErBx+FuuYaqKLxwC5algy7iIp7uoo5STwVgFuTtWwsvjwCRU6EQE17YKP8eGDy74V588qk5c0vUOI7Boiws0cuLitClrxp/rt1EJQjPprSPhxZMHUpOObL80e3OPJguTffTYTY0A5O02KlwzZM5y8X2xWsmVwwOdLykRMiUoZVGpOVlHkiY10Sw+gzipy1WR29NtBlDrrK4if6bTzHwThrjzyRrcNwiMs1iYscjrlZ6vrGHBTM9wusEm4iwIDAQAB",
  "applications": {
    "gecko": {
      "id": "{019bcf34-ddf9-4271-a9e6-b1dd1ddb6c04}"
    }
  },
  "description": "The missing tool for users of Capsule CRM and LinkedIn. No more copy-pasting.",
  "permissions": [
    "tabs",
    "activeTab",
    "identity",
    "webNavigation",
    "webRequest",
    "storage",
    "https://*.capsulecrm.com/*",
    "https://*.linkedin.com/in*",
    "https://getencapsulate.com/*"
  ],
  "icons": {
    "16": "img/logo-16x16.png",
    "48": "img/logo-48x48.png",
    "128": "img/logo-128x128.png"
  }
}