Please would you explain why adding ’ > slot’ fixed Issue: toolbarbuttons_in_tabs_periphery.css makes some tabs jump several by pixels when hovered, resizing of tabs is weird #419

And similarly why adding ’ > slot’ to the line 4. selector also fixes this tab-centering code broken in Fx131.0 update?:

‘#tabbrowser-arrowscrollbox:not([overflowing]){ –uc-flex-justify: center; } scrollbox[orient=“horizontal”]{ justify-content: var(–uc-flex-justify,initial); }’

From OP YOUBESEENUMBA1’s post ‘Update 131.0 broke tab-centering code’: https://www.reddit.com/r/FirefoxCSS/comments/1fxb0wb/update_1310_broke_tabcentering_code/