edge-frfox/chrome/userContent/NewTab.css

/* New Tab Page */
@-moz-document url("about:newtab"), url("about:home") {
  .icon.icon-settings {
    background-image: url(../icons/settings.svg) !important;
    background-size: 20px !important;
  }

  .search-wrapper .search-button {
    background-image: url(../icons/search.svg) !important;
    background-size: 20px !important;
  }

  .icon.icon-history-item {
    background-image: url(../icons/history.svg) !important;
  }

  .icon.icon-bookmark-added {
    background-image: url(../icons/star.svg#fill) !important;
  }

  .icon.icon-download {
    background-image: url(../icons/download.svg#arrow-with-bar) !important;
  }

  .search-wrapper input {
    border: 0 !important;
    box-shadow: none !important;
    fill: var(--newtab-search-icon-color);
    border-radius: 4px !important;
    outline: none !important;
  }

  .search-inner-wrapper input {
    transition: box-shadow .2s ease-in-out !important;
    box-shadow: 0px 1.6px 3.6px rgb(0 0 0 / 13%), 0px 0px 2.9px rgb(0 0 0 / 11%) !important;
  }

  .search-inner-wrapper:hover input {
    box-shadow: 0px 3.2px 7.2px rgb(0 0 0 / 13%), 0px 0px 3.8px rgb(0 0 0 / 11%) !important;
  }

  .search-wrapper :is(input, button) {
    height: 44px !important;
  }

  #searchSubmit {
    width: 68px !important;
    background-color: var(--search-button-bg) !important;
  }

  #searchSubmit:hover {
    background-color: var(--search-button-bg-hover) !important;
  }

  .top-site-outer .tile,
  .screenshot,
  .top-site-icon {
    border-radius: 8px !important;
  }

  .card-outer .card-preview-image-outer {
    background-color: #0002 !important;
  }

  .outer-wrapper:not(.newtab-experience) .top-site-outer .top-site-icon,
  .outer-wrapper:not(.newtab-experience) .top-site-outer .screenshot {
    box-shadow: none !important;
  }

  .top-site-outer:not(:hover) .tile {
    box-shadow: var(--newtab-card-shadow) !important;
  }

  .compact-cards .card-outer .card-context::after,
  .card-outer .card-preview-image-outer::after {
    border-color: #0001 !important;
  }

  .top-site-outer .screenshot {
    background-color: transparent !important;
  }

  body:not([lwt-newtab], [style*="color"]) {
    --newtab-background-color: #f7f7f7 !important;
    --newtab-search-header-background-color: #f7f7f7f0 !important;
    --newtab-text-primary-color: #000 !important;
    --newtab-textbox-background-color: #fff !important;
    --newtab-topsites-background-color: #fff !important;

    --search-button-bg: #0078D4;
    --search-button-bg-hover: #006CBE;
    --newtab-search-icon-color: #fff !important;

    --newtab-snippets-background-color: var(--newtab-topsites-background-color) !important;
    --newtab-card-background-color: var(--newtab-topsites-background-color) !important;
    --newtab-card-hairline-color: var(--newtab-topsites-background-color) !important;
  }

  body[lwt-newtab-brighttext]:not([style*="--newtab-background-color"], [style*="--newtab-text-primary-color"]) {
    --newtab-background-color: #242424 !important;
    --newtab-search-header-background-color: #242424f0 !important;
    --newtab-text-primary-color: #fff !important;
    --newtab-textbox-background-color: #424242 !important;
    --newtab-topsites-background-color: #424242 !important;

    --search-button-bg: #006CBE;
    --search-button-bg-hover: #0078D4;
    --newtab-search-icon-color: #fff !important;

    --newtab-snippets-background-color: var(--newtab-topsites-background-color) !important;
    --newtab-card-background-color: var(--newtab-topsites-background-color) !important;
    --newtab-card-hairline-color: var(--newtab-topsites-background-color) !important;
  }
}

/* Private Browsing Page */
@-moz-document url("about:privatebrowsing") {
  html.private {
    --in-content-page-color: #000d !important;
    --in-content-text-color: #000 !important;
    --in-content-page-background: #f5f5f5 !important;
  }

  .wordmark {
    fill: #737373 !important;
  }

  .info {
    background-color: #fff !important;
    background-image: url(../icons/incognito.svg) !important;
  }

  .search-handoff-button {
    background-color: #fff !important;
    color: #000 !important;
  }

  @media (prefers-color-scheme: dark) {
    html.private {
      --in-content-page-color: #fffd !important;
      --in-content-text-color: #fff !important;
      --in-content-page-background: #242424 !important;
    }

    .wordmark {
      fill: #f5f5f5 !important;
    }

    .info {
      background-color: #2b2b2b !important;
    }

    .search-handoff-button {
      background-color: #424242 !important;
      color: #fff !important;
    }
  }

  .fake-textbox {
    color: inherit !important;
  }

  .search-handoff-button {
    border: 0 !important;
    border-radius: 4px !important;
    height: 44px !important;
    transition: box-shadow .2s ease-in-out !important;
    box-shadow: 0px 1.6px 3.6px rgb(0 0 0 / 13%), 0px 0px 2.9px rgb(0 0 0 / 11%) !important;
  }

  .search-handoff-button:hover {
    box-shadow: 0px 3.2px 7.2px rgb(0 0 0 / 13%), 0px 0px 3.8px rgb(0 0 0 / 11%) !important;
  }
}