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

error message of "404 - page not found" after downloading and installing Firefox 15

more options

Error message of "404 page not found" after downloading the latest version of Firefox.

Error message of "404 page not found" after downloading the latest version of Firefox.

Chosen solution

This sometimes is the result of firewall software protecting you from changed applications. Or it might be something else. Can you review this article and see whether it helps: Firefox can't load websites but other browsers can.

Read this answer in context 👍 2

All Replies (1)

more options

Chosen Solution

This sometimes is the result of firewall software protecting you from changed applications. Or it might be something else. Can you review this article and see whether it helps: Firefox can't load websites but other browsers can.