Kilotest: Diagnoses of line height low violation by HTML element 208 on Mozilla Foundation page

Here is how tools diagnose the line height low issue for HTML element 208 of the Mozilla Foundation page.

Basics

• About the line height low issue
  • Why it matters: Text is difficult to read
  • Priority: low
  • Related WCAG standard: 1.4.8
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 208
  • Take me there
  • Tag name: BUTTON
  • Text: Close About us menu
  • Start tag: <button class="m24-c-menu-button-close" type="button" aria-controls="m24-c-menu-panel-about">
  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[2]/div[1]/div[1]/button[1]
  • Bounding box: x = 0, y = 0, width = 0, height = 0

Diagnoses

1. Element line height (20.0px) is less than 1.5 times its font size (16.0px)

   Tool: Testaro (CVS Health)

   Rule: lineHeight