Unverified50% confidenceFactExact time

Robert O'Callahan worked at Mozilla for a long time.

1

Sources

50%

Confidence

Long-term

Relevance

9/25/2026

First Seen

Sources

Goodbye Google: Reflections from a Senior Engineer's Departure

Related Entities

Robert O'Callahanperson Mozillacompany

Related Claims

UnverifiedRobert O'Callahan is the primary author of rr, a Linux debugging tool developed by Mozilla.70% similar UnverifiedRobert O'Callahan is a major contributor to the core rendering engine of the Firefox browser.69% similar UnverifiedO'Reilly Media was founded by Tim O'Reilly in 1978.52% similar

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