Simon Willison’s Weblog

There is no WebKit on Mobile. PPK ran 27 tests against 19 different WebKit-on-mobile implementations and found enormous disparities between the levels of support in currently available mobile phones.

Posted 7th October 2009 at 12:23 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

mobile 40 ppk 6 standards 34 testing 67 webkit 28

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