Kilotest: Violations of z-index not zero issue for Mozilla Foundation page

Basics

About the Mozilla Foundation page

• URL: https://www.mozilla.org/en-US/
• Tested 30 days ago by job 9wj on 2026-05-03 at 04:32

About the z-index not zero issue

• Why it matters: User cannot predict the effect of clicking
• Priority: lowest
• Related WCAG standard: 1.4
• Reported by 1 tool (Testaro)
• 6 violators were reported

Violators

Here are the HTML elements reported to violate rules belonging to the z-index not zero issue.

Take me there links will open the page in a new tab and try to scroll to the element and highlight it. This does not always succeed. You can return here by closing the new tab.

• Element 129

  • XPath: /html/body/aside[1]
  • Tag name: ASIDE
  • Text: Help us improve your Mozilla experience … Cookie settings
  • Reported by Testaro
  • Take me there
  • What diagnoses were reported?

• Element 138

  • XPath: /html/body/nav[1]
  • Tag name: NAV
  • Text: Products … About us
  • Reported by Testaro
  • What diagnoses were reported?

• Element 148

  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[1]
  • Tag name: LI
  • Text: Products
  • Reported by Testaro
  • What diagnoses were reported?

• Element 150

  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[1]/div[1]
  • Tag name: DIV
  • Text: Close Products menu … All products
  • Reported by Testaro
  • Take me there
  • What diagnoses were reported?

• Element 204

  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[2]
  • Tag name: LI
  • Text: About us
  • Reported by Testaro
  • Take me there
  • What diagnoses were reported?

• Element 206

  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[2]/div[1]
  • Tag name: DIV
  • Text: Close About us menu … Mozilla New Products
  • Reported by Testaro
  • Take me there
  • What diagnoses were reported?