gecko-dev/docs/_static/custom_theme.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* Increase the size of the content */
.wy-nav-content {
    max-width: 80% !important;
}

/* Increase the size of the tables */
table.docutils {
    width: 90%;
}

/* Override the default values for multiline text in a table */
table.docutils td, table.docutils th
{
    font-size: 16px !important;
}

.rst-content .line-block {
    margin-bottom: 0px !important;
}

/* Add the strikethrough feature */
span.strikethrough {
    text-decoration: line-through;
}