Kilotest: Diagnoses of parent invalid violation by HTML element 56 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: User cannot properly operate an item
• Priority: highest
• Related WCAG standard: 1.3.1
• Reported by 1 rule engine (Html Checker)
• Violations: 1
• Violators: 1

About the violator

• Tag name: DIV
• Text: [not applicable]
• Start tag: <div class="inner">
• XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/button[1]/div[1]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the parent invalid issue for HTML element 56 of the Mozilla Foundation join us page.

1. Element div not allowed as child of element button in this context. (Suppressing further errors from this subtree.)

   Rule engine: Html Checker (World Wide Web Consortium)