Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Rechercher dans l’assistance

Évitez les escroqueries à l’assistance. Nous ne vous demanderons jamais d’appeler ou d’envoyer un SMS à un numéro de téléphone ou de partager des informations personnelles. Veuillez signaler toute activité suspecte en utilisant l’option « Signaler un abus ».

En savoir plus
Ce sujet de discussion a été archivé. Veuillez poser une nouvelle question si vous avez besoin d’aide.
Archivé

CSS Grid Overlay Appears in Firefox but Not in Other Browsers

Firefox Navigation
Vladimirt345 a répondu
Vladimirt345
Vladimirt345

I'm experiencing an unusual issue in Firefox: a CSS grid overlay is visible on various websites, while everything displays normally in other browsers (Chrome, Edge, etc.). This grid is not part of the actual website design and does not appear when using other browsers.

I haven’t activated any developer tools or extensions intentionally that would cause this behavior. Could you please help me identify what might be causing this and how to disable it?

I'm experiencing an unusual issue in Firefox: a CSS grid overlay is visible on various websites, while everything displays normally in other browsers (Chrome, Edge, etc.). This grid is not part of the actual website design and does not appear when using other browsers. I haven’t activated any developer tools or extensions intentionally that would cause this behavior. Could you please help me identify what might be causing this and how to disable it?
Captures d’écran jointes

Toutes les réponses (4)

Denys
Denys
  • Moderator
  • Top 10 Contributor

Hi,

If you run Firefox in Troubleshoot Mode, does the problem persist?

Vladimirt345
Vladimirt345 Auteur de la question

The issue is resolved in Trobleshoot Mode, but "Refresh Firefox" and deleting prefs.js don't help.

Denys
Denys
  • Moderator
  • Top 10 Contributor

If the problem does not persist in Troubleshoot Mode, the most likely cause is an extension, theme or hardware acceleration. Generally, further troubleshooting steps are described in this article. Refreshing Firefox should have removed extensions and themes, but that may not be the case for hardware acceleration. Anyway, I'd go through all the steps just to be sure.

Looking forward to your update on how it goes!