sal ed9355ced6 Add HTTP header spoofing, fix timezone overrides, and expand fingerprint coverage ...

- Spoof User-Agent and Accept-Language HTTP headers per container via
  webRequest.onBeforeSendHeaders, eliminating JS/HTTP header mismatch
- Wrap Intl.DateTimeFormat constructor to inject spoofed timezone
- Pre-create timezone formatters outside exportFunction callbacks to
  avoid cross-compartment issues with Date.toString/toTimeString
- Fix WebRTC relay-only config to use JSON serialization across
  Firefox compartment boundaries
- Add new fingerprint vector protections: speechSynthesis.getVoices(),
  matchMedia screen dimension queries, performance.now() precision
  reduction, navigator.storage.estimate(), WebGL extension normalization
- Add comprehensive fingerprint test page (test/fingerprint-test.html)
  covering all 17 vectors with per-container comparison support

2026-03-01 15:22:21 -06:00

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