Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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

Firefox hangs due to I/O while waiting for "Save As"

  • 3 replies
  • 1 has this problem
  • 15 views
  • Last reply by philipp

more options

When clicking a download link on a website, I get the save/cancel dialog, but then Firefox freezes while the file downloads, gets scanned by MSE, then finally allows me to click the save button. Firefox should not attempt to download the file until I click save.

When clicking a download link on a website, I get the save/cancel dialog, but then Firefox freezes while the file downloads, gets scanned by MSE, then finally allows me to click the save button. Firefox should not attempt to download the file until I click save.

All Replies (3)

more options

hello bunder, this is intended behaviour & won't change (refer to bug #295410).

if you're experiencing delays by virus scanners you could try to toggle the browser.download.manager.scanWhenDone preference in about:config.

more options

Changing that option won't help much. The lag occurs "before" the file is downloaded.

more options

it might be worth a try nevertheless - when it's a small file it might have been already downloaded into the temp-folder in the background before the save dialog pops-up...