React version: 19.2

Steps To Reproduce

when I go to https://react.dev/blog/2025/04/23/react-labs-view-transitions-activity-and-more, none of the view transitions show the cross-fade animations in Firefox Developer Edition (145.0b5 (aarch64)). However, I see the animations in both Safari (Version 26.0.1 (21622.1.22.11.15)) and Google Chrome (Version 141.0.7390.109).

In all three browsers, I see no relevant warnings in devtools, and no errors.

The current behavior

The expected behavior