We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How can I disable an Alert that indicates:"The URL is not valid and cannot be loaded".

  • 2 replies
  • 7 have this problem
  • 2 views
  • Last reply by psychedelia

more options

This Alert frequently pops up even after I've accessed a valid URL site on Firefox. Sometimes it takes 2 or 3 clicks to close the Alert window.

This Alert frequently pops up even after I've accessed a valid URL site on Firefox. Sometimes it takes 2 or 3 clicks to close the Alert window.

All Replies (2)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

more options

In the references in the Reply, there was no indication of removing the "Alert Window". I hesitate to make any changes in Safe Mode until I know for sure that I am dealing with the problem.