Simon Willison’s Weblog

The versioning switch is not a browser detect. PPK: “In other words, the versioning switch does not have any of the negative effects of a browser detect.”

Posted 22nd January 2008 at 4:34 pm

Recent articles

Wilson Lin on FastRender: a browser built by thousands of parallel agents - 23rd January 2026
First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
My answers to the questions I posed about porting open source code with LLMs - 11th January 2026

browserdetect 1 browsers 95 doctypeswitching 2 ie8 25 internet-explorer 74 ppk 6 web-standards 47 xuacompatible 10

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