Examine source code of SCTPextension

{
  "name": "SCTPextension",
  "description": "Plugin di gestione Smart Card",
  "icons": {
    "128": "icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "sctp_lib@innovery.net",
      "strict_min_version": "50.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts.js"
      ]
    }
  ],
  "version": "1.0.7",
  "manifest_version": 2,
  "web_accessible_resources": [
    "icon-128.png"
  ],
  "permissions": [
    "nativeMessaging",
    "tabs",
    "management"
  ]
}