Kilotest: Diagnoses of attribute invalid violation by HTML element 27 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: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1
• Reported by 1 rule engine (Html Checker)
• Violations: 4
• Violators: 4

About the violator

• Tag name: META
• Text: [not applicable]
• Start tag: <meta itemprop="description" content="The Internet is built by people like you. Join Mozilla Foundation and make technology a force for good.">
• XPath: /html/head[1]/meta[16]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 27 of the Mozilla Foundation join us page.

1. The itemprop attribute was specified, but the element is not a property of any item.

   Rule engine: Html Checker (World Wide Web Consortium)