user styles

blog.cloudflare.com.css

@namespace url(http://www.w3.org/1999/xhtml);

/* Remove <aside> sidebar and expand content */
@-moz-document domain("blog.cloudflare.com") {
  aside.sidebar {
    display: none;
  }
  
  section.primary-content {
    float: initial;
    margin-left: initial;
    margin: initial;
    width: initial;
  }
}

golang.org.css

@namespace url(http://www.w3.org/1999/xhtml);

/* Replace Go font with something readable */
@-moz-document domain("golang.org") {
  body {
    font-family: Arial, sans-serif;
  }
  pre, code {
    font-family: Consolas, Inconsolata, monospace;
	}
}