Examine source code of SISQUAL e-Sign Extension

{
  "manifest_version": 2,
  "name": "SISQUAL e-Sign Extension",
  "version": "1.0",
  "description": "Extension to be used with SISQUAL e-Sign app.",
  "permissions": [
    "nativeMessaging",
    "scripting",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "32": "logo_sisqual_sign_32x32.png"
  },
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{15254490-5691-42f8-88f4-13a13ab395aa}"
    }
  }
}