chrome/browser/resources/discards/discards_tab.html

    <style include="action-link">
      table {
        border-collapse: collapse;
      }

      table td,
      table th {
        border: 1px solid #777;
        padding-inline-end: 4px;
        padding-inline-start: 4px;
      }

      @media (prefers-color-scheme: dark) {
        table td,
        table th {
          border-color: var(--cr-separator-color);
        }
      }

      table th {
        background: rgb(224, 236, 255);
        padding-bottom: 4px;
        padding-inline-end: 16px;
        padding-top: 4px;
        white-space: nowrap;
      }

      @media (prefers-color-scheme: dark) {
        table th {
          background: var(--google-grey-800);
        }
      }

      table th[data-sort-key] {
        cursor: pointer;
      }

      table th div.header-cell-container {
        align-items: center;
        display: flex;
        justify-content: flex-start;
      }

      @media (prefers-color-scheme: dark) {
        table td {
          background-color: var(--google-grey-900);
          color: var(--cr-secondary-text-color);
        }
      }

      table td.title-cell {
        max-width: 200px;
        overflow: hidden;
        white-space: nowrap;
      }

      table td div.title-cell-container {
        align-items: center;
        display: flex;
        justify-content: flex-start;
      }

      table td div.favicon-div {
        height: 16px;
        margin: 3px;
        min-width: 16px;
      }

      table td div.title-div {
        overflow: hidden;
        white-space: nowrap;
      }

      table td.tab-url-cell {
        max-width: 200px;
        overflow: hidden;
        white-space: nowrap;
      }

      table td.visibility-cell {
        width: 6em;
      }

      table td.loading-state-cell {
        width: 6em;
      }

      table td.state-cell {
        width: 10em;
      }

      table td.boolean-cell,
      table td.discard-count-cell,
      table td.reactivation-score-cell,
      table td.site-engagement-score-cell,
      table td.utility-rank-cell {
        text-align: center;
      }

      table td div[is=action-link],
      table td.actions-cell {
        font-size: 0.6rem;
      }

      table tr:hover {
        background: rgb(255, 255, 187);
      }

      @media (prefers-color-scheme: dark) {
        table tr:hover td {
          background: var(--google-grey-800);
        }
      }

      th div.header-cell-container::after {
        content: '▲';
        opacity: 0;
      }

      th.sort-column div.header-cell-container::after {
        content: '▲';
        opacity: 1;
      }

      th.sort-column-reverse div.header-cell-container::after {
        content: '▼';
        opacity: 1;
      }

      .tooltip-container {
        position: relative;
      }

      .tooltip {
        background: black;
        color: white;
        display: none;
        font-size: 0.75rem;
        left: 50%;
        margin-inline-start: -100px;
        margin-top: 4px;
        padding: 4px;
        position: absolute;
        top: 100%;
        width: 200px;
        z-index: 1;
      }

      .tooltip-container:hover > .tooltip {
        display: block;
      }
    </style>
    <div id="discards">
      <div is="action-link" on-click="discardUrgentNow_">
        [Urgent discard a tab now]
      </div>
      <div is="action-link" on-click="toggleHighEfficiencyMode_">
        [Toggle high efficiency mode]
      </div>
      <div is="action-link" on-click="toggleBatterySaverMode_">
        [Toggle battery saver mode]
      </div>
      <table id="tab-discard-info-table">
        <thead >
          <tr id="tab-discards-info-table-header">
            <th data-sort-key="utilityRank" class="sort-column"
                on-click="onSortClick">
              <div class="header-cell-container">
                <div>
                  <div>Utility</div>
                  <div>Rank<div>
                </div>
              </div>
            </th>
            <th data-sort-key="siteEngagementScore" on-click="onSortClick">
              <div class="header-cell-container">
                <div>
                  <div>Site</div>
                  <div>Engagement</div>
                  <div>Score</div>
                </div>
              </div>
            </th>
            <th data-sort-key="title" on-click="onSortClick">
              <div class="header-cell-container">
                Tab Title
              </div>
            </th>
            <th data-sort-key="tabUrl" on-click="onSortClick">
              <div class="header-cell-container">
                Tab URL
              </div>
            </th>
            <th data-sort-key="visibility" on-click="onSortClick">
              <div class="header-cell-container">
                Visibility
              </div>
            </th>
            <th data-sort-key="loadingState" on-click="onSortClick">
              <div class="header-cell-container">
                Loading State
              </div>
            </th>
            <th data-sort-key="state" on-click="onSortClick">
              <div class="header-cell-container">
                <div>
                  <div>Lifecycle</div>
                  <div>State</div>
                </div>
              </div>
            </th>
            <th data-sort-key="discardCount" on-click="onSortClick">
              <div class="header-cell-container">
                <div>
                  <div>Discard</div>
                  <div>Count</div>
                </div>
              </div>
            </div></th>
            <th data-sort-key="isAutoDiscardable" on-click="onSortClick">
              <div class="header-cell-container">
                <div>
                  <div>Auto</div>
                  <div>Discardable</div>
                </div>
              </div>
            </th>
            <th data-sort-key="lastActiveSeconds" on-click="onSortClick">
              <div class="header-cell-container">
                Last Active
              </div>
            </th>
            <th>
              <div class="header-cell-container">
                Actions
              </div>
            </th>
          </tr>
        </thead>
        <tbody id="tab-discards-info-table-body">
          <template is="dom-repeat"
              sort="[[computeSortFunction_(sortKey, sortReverse)]]"
              items="[[tabInfos_]]">
            <tr>
              <td>[[item.utilityRank]]</td>
              <td>[[getSiteEngagementScore_(item)]]</td>
              <td>
                <div class="title-cell-container">
                  <div class="favicon-div"
                    style$="[[getFavIconStyle_(item)]];"></div>
                  <div class="title-cell">[[item.title]]</div>
                </div>
              </td>
              <td class="tab-url-cell">[[item.tabUrl]]</td>
              <td>[[visibilityToString_(item.visibility)]]</td>
              <td>[[loadingStateToString_(item.loadingState)]]</td>
              <td>[[getLifeCycleState_(item)]]</td>
              <td>[[item.discardCount]]</td>
              <td class="boolean-cell">
                <div>[[boolToString_(item.isAutoDiscardable)]]</div>
                <div is="action-link" class="is-auto-discardable-link"
                    on-click="toggleAutoDiscardable_">
                  [Toggle]
                </div>
              </td>
              <td class="last-active-cell">
                [[durationToString_(item.lastActiveSeconds)]]
              </td>
              <td class="actions-cell">
                <div is="action-link" on-click="loadTab_"
                    disabled$="[[!canLoad_(item)]]">
                    [Load]</div>
                <div is="action-link" on-click="urgentDiscardTab_"
                    disabled$="[[!canDiscard_(item)]]">
                  [Urgent Discard]
                </div>
              </td>
            </tr>
          </template>
        </tbody>
      </table>
    </div>