Disable Automatic Virus Scanning in Firefox 3

By default, Firefox 3 runs anti-virus scans on downloaded files in Windows systems with anti-virus software installed. Depending on the type and size of the files downloaded Firefox can stop responding for a significant amount of time while the virus scan is being performed. Follow the steps below to disable automatic virus scanning in Firefox 3:

• Type about:config in the Firefox location bar
• Click the "I'll be careful, I promise!" button if the "This might void your warranty!" message is displayed.
• Type browser.download.manager.scanWhenDone as the Filter. Alternatively you can just navigate to the setting browser.download.manager.scanWhenDone in the about:config page.
• Change the value of browser.download.manager.scanWhenDone to false.

Note: Do not disable automatic virus scanning in Firefox if your anti-virus software does not support real-time protection.