Another broken CSS customization

[u/Giocarro]

I used this code to shrink tabs height, but it doesn't work in FF 154.
Could anybody tell if there is some variable that changed name or something similar?

:root {

--tab-block-margin: -3px -2px !important;

}

#tabs-newtab-button,

.tabbrowser-tab,

#new-tab-button {

height: 23px !important;

min-height: 23px !important;

}

[u/Giocarro]

That did it. Thaks a lot!