astro/.changeset/great-turtles-clap.md

astro
patch

The prefetch feature is updated to better support different browsers and different cache headers setup, including:

1. All prefetch strategies will now always try to use <link rel="prefetch"> if supported, or will fall back to fetch().
2. The prefetch() programmatic API's with option is deprecated in favour of an automatic approach that will also try to use <link rel="prefetch> if supported, or will fall back to fetch().

This change shouldn't affect most sites and should instead make prefetching more effective.