Speculation rules webkit #28663
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Speculation rules webkit #28663
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yoavweiss
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Dec 15, 2025
Elchi3
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Dec 17, 2025
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Thanks @tunetheweb and @yoavweiss 👍
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Summary
Webkit has implemented an initial version of Speculation Rules (prefetch only) behind a flag. This only includes some of Speculation Rules the features (notable no prerender but also a couple of other features).
Test results and supporting details
When you turn this on you (and restart Safari) you can visit https://chrome.dev/prerender-demos/prefetch.html and see the pages are prefetched:
Implementation bug: https://webkit.org/b/295193
Implemented in these PRs by @yoavweiss :
https://github.com/WebKit/WebKit/pulls?q=is%3Apr+author%3Ayoavweiss+is%3Aclosed+SpeculationRules
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