To work with elements in transformed containers, at least. And anchored containers as a wish. 
bundyo@bundyo.com
@bundyo@bundyo.com
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If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort? -
If you had to pick _one_, which web platform feature would you like in Firefox that isn't part of the Interop 2026 effort?Directly support Anchor Positioning API v2

It will nicely supplement the dialog APIs too.
