Kilotest: Diagnoses of font size absolute violation by HTML element 579 on Mozilla Foundation page

Basics

About the page

• URL: https://www.mozilla.org/en-US/
• Tested 32 days ago on 2026-09-08 at 04:02 by job 260908T0359-xmh
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 753
  • Violators: 192
  • Issues: 47
• Download the full technical report (JSON)

About the issue

• Why it matters: User cannot adjust the text size for readability
• Priority: low
• Related WCAG standard: 1.4.4
• Reported by 1 rule engine (Alfa)
• Violations: 2
• Violators: 2

About the violator

• Tag name: HEADER
• Text: 2025 … Read the report
• Start tag: <header class="m24-c-showcase-text m24-l-two-columns">
• XPath: /html/body/div[2]/main[1]/div[6]/div[1]/header[2]
• Bounding box: x = 272, y = 5986, width = 1376, height = 93
• Reported by Alfa

Take me there

Diagnoses

Here is how rule engines diagnose the font size absolute issue for HTML element 579 of the Mozilla Foundation page.

1. The font size is specified using an absolute unit

   Rule engine: Alfa (Siteimprove)

   Rule: r74