{
  "date": "2026-09-26",
  "firefox": {
    "playwright_build": "1543",
    "executable_sha256": "062272ac4d851eade5b75db2dc7c14569d96cb3ca38f949337cdc1b74367e35b",
    "version": "155.0"
  },
  "chromium": "Same executable as provenance.json; explicit override",
  "instrumentation": "In-memory esbuild transformation; installed package files unmodified",
  "initial_attempt": "Sandboxed run reached Firefox launch, which failed to access its temporary profile; no completed matrix receipt. Re-executed outside sandbox.",
  "limitations": [
    "Fixed condition order, three trials each, no population failure-rate inference",
    "Tracing and before-event snapshot can change scheduling; raw is an unmodified-library control",
    "ready uses private listener instrumentation, not a public product readiness API",
    "guarded is an experimental mutation, not vendor behavior or a validated fix"
  ]
}