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When restarting Firefox due to an upgrade, installed or updated extensions, or installed or updated themes, every browser window will be closed. This preference determines whether or not a warning dialog appears before this happens.

Possible values and their effects


Display a dialog before restarting the browser, warning that all windows will be closed. (Default)


Do not require confirmation from the user when restarting.


A checkbox labeled “Do not ask next time” appears on the confirmation dialog; when checked, this preference is toggled to false.

First checked in

2008-02-23 by Reed Loden (patch by Dão Gottwald)

Has an effect in

  • Firefox (nightly builds since 2008-02-23)

Related bugs

Related preferences