Bloß wo?
Teste bitte:
CSS
div[style^='border-block-style: initial; border-inline: initial; border-end-end-radius: initial; border-end-start-radius: initial; border-start-end-radius: initial; border-start-start-radius: initial; border-block-width: initial; border-block-color: initial; overflow-block: initial; overflow-inline: initial; overscroll-behavior-block: initial; overscroll-behavior-inline: initial;'] {
display: none !important;
> div {
left: 50% !important;
right: auto !important;
transform: translateX(-50%) !important;
}
}
@-moz-document url-prefix('https://www.youtube.com') {
div[style^='border-block-style: initial; border-inline: initial; border-end-end-radius: initial; border-end-start-radius: initial; border-start-end-radius: initial; border-start-start-radius: initial; border-block-width: initial; border-block-color: initial; overflow-block: initial; overflow-inline: initial; overscroll-behavior-block: initial; overscroll-behavior-inline: initial;'] {
display: block !important;
}
}
@-moz-document domain(google.com) {
body {
background-image: url(https://images5.alphacoders.com/574/thumb-1920-574971.jpg) !important;
}
}