Web platform features explorer

Speculation rules

Limited availability
Tags: api html http

Speculation rules are hints to the browser to proactively download pages in the background so they appear instantly when the user navigates to them.

Browser support

  • Chrome 109 Released on 2023-01-10
  • Chrome Android 109 Released on 2023-01-10
  • Edge 109 Released on 2023-01-12
  • Firefox Vendor position : neutral (concerns: complexity)
  • Firefox for Android Vendor position : neutral (concerns: complexity)
  • Safari
  • Safari on iOS

Origin trials

Origin trials let you try experimental features on your production website and give feedback to browser vendors. This feature currently has the following origin trials available:

Usage (according to Chrome Platform Status)

~11.334% of page loads. More data at chromestatus.