Check your bookmarks page, and you will see something similar to:
Possible Root Cause
This page is styled using a table layout. I found this commit that removes
display: table on the parent container but
display: table-row / table-cell are still applied to the children. By default, The widths of the table and its cells are adjusted to fit the content, and thus the right side is wider than expected.
Revert this commit and add
table-layout: fixed, so that the content of the table cells will not affect the width of the table.
Drop the table layout completely, and restyle this page with other CSS techniques. (maybe
float? I confess I am no expert in CSS)
I’d be happy to PR this fix once we have decided a general direction.