Examine source code of VES

{
  "name": "VES",
  "description": "VES extension",
  "version": "0.50",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "https://*.vesvault.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{26f3065e-cc6c-4745-97be-a4962ab87249}",
      "strict_min_version": "58.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.vesvault.com/*"
      ],
      "js": [
        "vvext.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "worker.js"
    ]
  },
  "icons": {
    "128": "vesvault-sq-black-128x128.png"
  },
  "browser_action": {}
}