Examine source code of ISIDA Document Editor

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "applications": {
    "gecko": {
      "id": "isida_document_editor@webextisida.by",
      "strict_min_version": "50.0"
    }
  },
  "manifest_version": 2,
  "name": "ISIDA Doc Editor Extension",
  "permissions": [
    "nativeMessaging"
  ],
  "version": "1.0.3",
  "web_accessible_resources": [
    "editor_api.js"
  ]
}