Firefox nova - Improve container tab highlight border - CSS snippet

After latest firefox update, the nova theme looks fine except the container tab highlight line, which looks cramped for space. Adding below to userChrome.css makes it much more tolerable.

/* Increase space between the container line and the top of the tab */
.tab-context-line {
  margin-top: 0px !important; /* Adjust the pixel (px) value as needed */
}