Describe the bug

The tooltips for charts are flickery on Firefox. In Edge they look fine.

To Reproduce

The bug can be observed in the example charts in the docs.

https://svelteplot.dev/features/interactivity#HTML-Tooltips

Expected behavior

The tooltip should not flicker.

Screenshots
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Desktop (please complete the following information):

• OS: Windows
• Browser: Firefox
• Version: 142.0b3 (64-bit)

Additional context
Add any other context about the problem here.