Kilotest: Diagnoses of line height low violation by HTML element 271 on Mozilla Foundation page

Here is how tools diagnose the line height low issue for HTML element 271 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 271
  • Take me there
  • Tag name: H1
  • Text: Welcome to Mozilla
  • Start tag: <h1 class="m24-c-flag-title">
  • XPath: /html/body/div[2]/main[1]/div[1]/section[1]/div[1]/h1[1]
  • Bounding box: x = 272, y = 169, width = 912, height = 256

Diagnoses

1. Element line height (128.0px) is less than 1.5 times its font size (128.0px)

   Tool: Testaro (CVS Health)

   Rule: lineHeight