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OPFS + Pyodide test harness

Simon Willison's Blog · 2026-06-23 Cached

A test harness for experimenting with the Origin Private File System (OPFS) in browsers using Pyodide, built to explore persistent SQLite storage for Datasette Lite.

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#opfs

FROST: Fingerprinting Remotely using OPFS-based SSD Timing [pdf]

Hacker News Top · 2026-05-31 Cached

This paper presents FROST, a technique for remotely fingerprinting users by exploiting timing differences in the OPFS-based SSD storage.

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