• Browser: Firefox
• Operating System: macOS
• Link to page with the issue: https://unix.stackexchange.com/questions/9743/numbering-convention-for-the-linux-kernel
• Screenshot:
  

Possibly affected style from Stack Exchange:

.s-prose a:not(.post-tag):not(.s-tag):not(.badge-tag):not(.s-link__visited):not(.s-btn):not(.s-editor-btn):visited,
.comment-copy a:visited {
  color:var(--theme-link-color-visited)
}

I guess we might need some !important somewhere.

Note: I enabled native dark theme in Stack Overflow, which might affect the value of --theme-link-color-visited.