Rearranging tabs results in sharp corners despite rounded tab shape

[gitgizmo7]

Steps to reproduce

• Open the tab tray
• Drag a tab to rearrange it

Expected behavior

Tab retains rounded shape even while rearranging

Actual behavior

Sharp corners appear on the tab, colored blue if the dragged tab was the active tab or black if the tab was inactive

Device & build information

• Device: iPhone 12
• Build version: Firefox Daylight 103.0 (13910)

Notes

Attachments:

┆Issue is synchronized with this Jira Task