Kilotest: Diagnoses of heading structure illogical violation by HTML element 453 on Mozilla Foundation join us page

Basics

About the page

• URL: https://www.mozillafoundation.org/en/join-us/
• Tested 3 days ago on 2026-10-07 at 21:54 by job 261007T2132-l0b
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 1762
  • Violators: 211
  • Issues: 46
• Download the full technical report (JSON)

About the issue

• Why it matters: Helper misdescribes the page
• Priority: low
• Related WCAG standard: 1.3.1
• Reported by 2 rule engines (ASLint + HTML CodeSniffer)
• Violations: 3
• Violators: 3

About the violator

• Tag name: DIV
• Text: Thank you! … If you haven’t previously confirmed your opt-in to a Mozilla Foundation-related email subscription you may have to do so now. Please check your inbox or spam filter for an email from us to click and confirm your subscription.
• Start tag: <div class="newsletter-signup__success-content">
• XPath: /html/body/div[3]/div[1]/div[1]/div[2]/div[3]/div[1]/div[1]/div[1]/div[1]/div[1]/div[2]/div[1]
• Bounding box: [not obtained]
• Reported by ASLint

Diagnoses

Here is how rule engines diagnose the heading structure illogical issue for HTML element 453 of the Mozilla Foundation join us page.

1. Expected <code><h4 class="newsletter-signup__success-title">Thank you!</h4></code> to be <code><h2></code>

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: headings_hierarchy