Remove separators from pinned tabs (Firefox 120 and newer)

[QNetITQ]

1. Enable tab separators
2. Create a file to add third-party styles (In the options description) and add the code below

Updated November 25.2023

/* ---------- Remove separators from pinned tabs ---------- */

.tabbrowser-tab[pinned]
{
    .tab-stack::before,
    .tab-stack::after
    {
        opacity: 0 !important;
    }
}

#tabbrowser-tabs:not([overflow]) .tabbrowser-tab:nth-child(1 of .tabbrowser-tab:not([pinned], [hidden]))
{
    margin-inline-start: var(--tab-first-last-inline-margin) !important;
    
    .tab-stack::before
    {
        content: "";
        display: block;
        position: absolute;
        width: 1px;
        height: 50%;
        border-inline-end: 1px solid currentColor;
        top: 25%;
        opacity: var(--separators-color-saturation, 0);
        box-sizing: border-box;
        pointer-events: none;
    }
}