Kilotest: Diagnoses of z-index not zero violation by HTML element 51 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 predict the effect of clicking
• Priority: lowest
• Related WCAG standard: 1.4
• Reported by 1 rule engine (Testaro)
• Violations: 3
• Violators: 3

About the violator

• Tag name: NAV
• Text: Meet Mozilla … Donate
• Start tag: <nav role="navigation" class="primary-nav-ns">
• XPath: /html/body/nav[1]
• Bounding box: x = 0, y = 0, width = 1920, height = 88
• Reported by Testaro

Diagnoses

Here is how rule engines diagnose the z-index not zero issue for HTML element 51 of the Mozilla Foundation join us page.

1. z-index style property of the element is 10

   Rule engine: Testaro (CVS Health)

   Rule: zIndex