Firefox 3.5 was released on June 30th 2009. Firefox 3.5.x will be maintained with security and stability updates until August 2010.

Table Of Contents

• Upgrading from Firefox 3.0.x
• Upgrading from Firefox 2 or earlier
• What's new in Firefox 3.5?

Upgrading from Firefox 3.0.x

If your copy of Firefox is from Mozilla instead of the package managerTo upgrade from Firefox 3.0.x, you need to be using the latest update to Firefox 3.0.x.

1. Open the Help menu and click Check for Updates... to be taken through the Firefox Update process.
2. Once you are upgraded to the latest update to Firefox 3.0.x, use Help > Check for Updates... again, to update to Firefox 3.5.

For more information, see Updating Firefox.

Note: You can also upgrade from Firefox 3.0.x by downloading Firefox 3.5 and installing it. See Installing Firefox for information on how to install.

Upgrading from Firefox 2 or earlier

Download Firefox 3.5 and install it. For information on how to install, see Installing Firefox.

Having problems after updating?
The following articles may be able to help:

• Cannot connect after upgrading Firefox
• Add-ons are disabled after updating Firefox
• Closing the only tab closes the window
• Right-clicking does not work
• Firefox is already running but is not responding
• Firefox will not start

What's new in Firefox 3.5?

Firefox 3.5 focuses on speed and keeping your data secure and private. New features include:

• Private Browsing Mode, which allows you to browse the Internet without Firefox retaining any data about which sites and pages you have visited.
• Forget About This Site, which allows you to delete all traces of a specific website from your history.
• Clear Recent History, which allows you to clear all traces of data in your history from the previous hour, two hours, four hours, or everything from that day.
• Recently closed windows, which allows you to re-open a window you may have accidentally closed.

For more information, you can read the Frequently Asked Questions about Firefox 3.5 page.