Rounded tab bar buttons (Firefox 137 and newer)

[QNetITQ]

There is a side effect! Some icons may be cut off at the edges

/* ---------- Rounded tab bar buttons ---------- */

.browser-titlebar
{
    --toolbarbutton-border-radius: 50px !important;
    --tab-border-radius: 50px !important;
}

.tabbrowser-tab:not([hidden]) + #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button
{
    margin-inline-start: calc(-1 * var(--tab-first-last-inline-margin, 0px)) !important;
}

[tockudex]

Thanks for the info, it's exactly what I was looking for !

I think it'd be great to integrate these line (and the others from the discussion) into your project, as they refresh Firefox's style and allow for an easier turn on/off mechanism.

[jukfiuune]

Can you make something similar, but the new tab button is like in australis (the button matches the tab style)?

[QNetITQ]

There have always been certain difficulties with this. I'll try a little later.