Examine source code of Certen Key Vault

{
  "manifest_version": 3,
  "name": "Certen Key Vault",
  "version": "1.0.0",
  "description": "Secure key vault and signer for the Certen Protocol - generates, stores, and signs with ED25519 and secp256k1 keys",
  "icons": {
    "16": "public/icons/icon-16.png",
    "32": "public/icons/icon-32.png",
    "48": "public/icons/icon-48.png",
    "128": "public/icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "public/icons/icon-16.png",
      "32": "public/icons/icon-32.png",
      "48": "public/icons/icon-48.png"
    },
    "default_title": "Certen Key Vault"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "permissions": [
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "inpage.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "key-vault@certen.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}