This article covers the situation where Firefox displays a message about crashing when you try to download files or save images.

• For other crash related issues, see the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

Firefox crashes when attempting to perform a virus scan

With some antivirus programs, the virus scan after files are downloaded may cause Firefox to crash. You can disable virus scanning in Firefox with the following steps:

1. Type about:config in the address bar and press EnterReturn.
   A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.
2. Locate the browser.download.manager.scanWhenDone preference and double click it to change the value to false.