Multidots, Simplify Theme has a footer with various social media logos that can be enabled, but it does not include a Facebook link. I don’t think dbolders wants another plugin, but just wants a Facebook link in with the others that Simplify Theme already has on the footer.
<div id="social">
<?php if (esc_url(of_get_option('youtube-link', '#')) !='') : ?>
<a href="<?php echo esc_url(of_get_option('youtube-link', '#')); ?>" class="youtube-link" target="_blank"></a>
<?php endif; if (esc_url(of_get_option('gplus-link', '#')) !='') : ?>
<a href="<?php echo esc_url(of_get_option('gplus-link', '#')); ?>" class="gplus-link" target="_blank"></a>
<?php endif; if (esc_url(of_get_option('picassa-link', '#')) !='') : ?>
<a href="<?php echo esc_url(of_get_option('picassa-link', '#')); ?>" class="picassa-link" target="_blank"></a>
<?php endif; if (esc_url(of_get_option('li-link', '#')) !='') : ?>
<a href="<?php echo esc_url(of_get_option('li-link', '#')); ?>" class="li-link" target="_blank"></a>
<?php endif; if (esc_url(of_get_option('feed-link', '#')) !='') : ?>
<a href="<?php echo esc_url(of_get_option('feed-link', '#')); ?>" class="feed-link" target="_blank"></a>
<?php endif; ?>
</div>