Alternatives for beforeselected-visible, beforehovered and last-visible-tab in FF 110?

[Yaron10]

Is your feature request related to a problem?

.tabbrowser-tab:not([selected], [beforeselected-visible], [beforehovered], [last-visible-tab], :hover)::after
{
    background-image: url("TabSeparator.png");
    background-repeat: no-repeat;
    margin-inline-start: 2px;
    margin-inline-end: -4px;
    width: 2px;
    content: "";
    display: block;
}

The solution I'd like

Any alternatives for beforeselected-visible, beforehovered and last-visible-tab in FF 110?

Thank you.

Screenshots or video

No response

Alternatives I've considered

No response

Additional context

No response

[black7375]

You can refence #628

[Yaron10]

@black7375,

Thank you. I appreciate your work.