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 Firefox crashes - Troubleshoot, prevent and get help fixing crashes 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. In the Location bar, type about:config and press EnterReturn.

   • The about:config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise!, to continue to the about:config page.
2. Locate the browser.download.manager.scanWhenDone preference and double click it to change the value to false.

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