Podes adicionar o seguinte código ao teu global.css.
Podes ler mais em "Entrando no novo ano com um novo design de navegação".
/* Revert to old nav design (credit: U.ayaao.p) */
.global-explore-navigation,
.global-top-navigation,
.community-navigation {
display: none!important;
}
html.new-nav-canary div.global-navigation,
html.new-nav-canary .fandom-sticky-header:not(.community-navigation) {
display: flex!important
}
.fandom-community-header__background {
transform:none;
}
.resizable-container, .top-ads-container, .top-leaderboard #top_leaderboard {
top: 0;
}
/* Adds back search icon from old nav design (credit: IWGTRS) */
html.new-nav-canary .fandom-community-header__top-container .wiki-tools__search, html.new-nav-canary .fandom-sticky-header:not(.community-navigation), html.new-nav-canary .global-registration-buttons {
display: flex!important
}