Security headers

Preview

Start local server with production build and applied security headers:

yarn workspace @trezor/suite-web preview

Build & Preview

Build web app and run the preview command:

yarn workspace @trezor/suite-web build:preview

or

root level command:

yarn suite:build:web:preview

Security Headers

Permissions-Policy Rationale (Enabled Directives)

• usb=(self):
  • packages/connect/src/index-browser.ts (window.navigator.usb.requestDevice(...))
  • packages/transport/src/transports/webusb.browser.ts
• camera=(self):
  • packages/suite/src/components/suite/modals/ReduxModal/UserContextModal/QrScannerModal/CameraQRReader.tsx (react-zxing camera scanner used for QR input)
• clipboard-write=(self):
  • packages/dom-utils/src/copyToClipboard.ts (navigator.clipboard.writeText(...))
  • packages/analytics-docs/src/components/AddEventModal/CopyButton.tsx
  • packages/analytics-docs/src/components/EventCard.tsx
• local-network-access=(self):
  • packages/suite/src/hooks/suite/useLocalNetworkAccessPermission.ts (navigator.permissions.query({ name: 'local-network-access' }))
  • packages/connect-web/src/impl/core-in-suite-desktop.ts (permission state check for websocket connectivity error handling)

clipboard-read is intentionally not enabled because current direct usage is test-only (suite/e2e/tests/wallet/receive.test.ts) rather than Suite Web runtime behavior.

Disabled directives (=()) are intentionally blocked because there is no direct web runtime use at this time.

Direct Code References

• Header values source: packages/suite-web/constants/webSecurityHeaders.ts
• Header type constraints: packages/suite-web/types/securityHeaders.ts

MDN references:

• Permissions Policy
• HTTP security headers overview