Dev Tools · 1h ago
Developer's extension silently lost half of AI chat conversations
A developer's browser extension for saving AI chat conversations had a bug that silently dropped assistant responses while preserving user messages. The bug stemmed from guessing CSS selectors that had changed without notice. After writing a probe script, the developer fixed the issue and also discovered that some images in AI chats are unsavable blob URLs.
Meridian48 take
The story underscores a common developer pitfall: assuming undocumented selectors stay stable, and the value of instrumentation over guesswork.
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My extension "worked" — it just quietly saved half of every conversation →
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