Firefox uses a tiny LSTM for Thai word breaks, prompting 'Thai-breaker' adversarial joke

moyix · x · 2026-09-26

While fixing Pretext, chenglou discovered that Firefox's Unicode logic uses a tiny neural net — an LSTM inside ICU4X that determines word breaks for Thai and other languages. Security veteran moyix quipped: could you generate adversarial examples against that word-break LSTM, and call it a "Thai-breaker"? A neat engineering nugget turned security pun.

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