Examine source code of Avocent KVM

{
  "manifest_version": 2,
  "name": "Avocent KVM",
  "description": "Intercepts Internet Explorer-specific Avocent pages and allows them to operate under Firefox or Chrome",
  "version": "1.0.6resigned1",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "applications": {
    "gecko": {
      "id": "avocent@the-computer-site.com",
      "strict_min_version": "50.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "avocent_16.png",
    "48": "avocent_48.png",
    "128": "avocent_128.png"
  },
  "permissions": [
    "activeTab",
    "http://*/*",
    "https://*/*",
    "webNavigation",
    "nativeMessaging"
  ]
}