Mozilla VPN is currently experiencing an outage. Our team is actively working to resolve the issue. Please check the status page for real-time updates. Thank you for your patience.

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

need to go back to Firefox 3.0. I have a problem running some things on our schools website with 4.0 because they havn't upgraded yet.

more options

I installed 4.0 on one of my personal computers. But I need to roll it back to 3.5 because we homeschool our kids. We use Firefox for their work. The problem is we can't use this version yet with their site. I need to uninstall 4.0 and find 3.5 again, or whatever the last version was before 4.0

I installed 4.0 on one of my personal computers. But I need to roll it back to 3.5 because we homeschool our kids. We use Firefox for their work. The problem is we can't use this version yet with their site. I need to uninstall 4.0 and find 3.5 again, or whatever the last version was before 4.0

Chosen solution

To downgrade to Firefox 3.6, download it here.

Read this answer in context 👍 5

All Replies (1)

more options

Chosen Solution

To downgrade to Firefox 3.6, download it here.