Release Notes for v42.9.1

Fixes

• Fixed a crash in systemPreferences.promptTouchID(reason) when an invalid reason value is passed. #52780 ^{(Also in 43, 44)}
• Fixed a potential crash in contentTracing.stopRecording() when the trace file could not be written to the requested path. #52796 ^{(Also in 43, 44)}

Other Changes

• Backported fixes from upstream ANGLE, Chromium, Skia and V8. #52706
• Backported fixes from upstream Chromium and V8. #52785
• Fixed an issue on macOS where a page's first use of speechSynthesis could block the main process for several hundred milliseconds. #52813