Complementary userstyle:

@-moz-document domain("spectrum.ieee.org") {
  header { box-shadow: initial !important; }
  #masthead { margin: 10px 0 0 0 !important; }
  article.item { padding: 0 !important; }

  .brand-space { width: 100%; }
  .ad-space { display: none !important; }
  #social-space { float: right; margin: 0 !important; }

  .article-main-title, .article-dek, .entry-content, .article-detail .xlrg { width: 800px !important; }
}