Disable virus scanning in Firefox after download
Here's how to stop Firefox from automatically virus scanning all downloads after they've finished - something that's been annoying me since I've upgraded to Firefox 3 because of the extraneous disk accesses it creates. Open up the
about:config (open a new tab, type
about:config in the location bar), and find the
browser.download.manager.scanWhenDone value. Type in
browser in the filter bar for quick searching. Set that value to false by double-clicking. And that's it! What, were you expecting something more?
(originally read here)