@media not (-moz-bool-pref: "zen.view.sidebar-expanded") {
  .tabbrowser-tab {
    /* Unhide the tab title and show only the first comptitle-width letters */
    .tab-label-container {
      --comptitle-width: 2ch;
      overflow: hidden;
      position: absolute;
      text-overflow: ellipsis;
      width: var(--comptitle-width);
      right: 0;
      white-space: nowrap;
      background: color-mix(
        in srgb,
        var(--background-color-box) 75%,
        transparent
      );
      height: 1rem !important;
      opacity: 1;
      top: 0;
      border-radius: 5px;
      font-family: monospace;
      display: flex !important;
      mask-image: none !important;
      color: var(--text-color-deemphasized);
    }

    /* Disable the "Playing" subtitle */
    .tab-secondary-label {
      display: none !important;
    }

    /* Accent the text when tab is selected */
    &[selected] {
      .tab-label-container {
        color: initial !important;
      }
    }

    /* 1 character */
    @media (-moz-bool-pref: "uc.theme.comptitle-one-char-title.enabled") {
      .tab-label-container {
        --comptitle-width: 1ch;
      }
    }

    /* 3 characters */
    @media (-moz-bool-pref: "uc.theme.comptitle-three-char-title.enabled") {
      .tab-label-container {
        --comptitle-width: 3ch;
      }
    }

    /* Enable on pinned tabs */
    @media (-moz-bool-pref: "uc.theme.comptitle-enable-pinned.enabled") {
      .tab-label-container {
        width: var(--comptitle-width) !important;
      }
    }

    /* Use active text color for all tabs */
    @media (-moz-bool-pref: "uc.theme.comptitle-default-text.enabled") {
      .tab-label-container {
        color: initial !important;
      }
    }
  }
}