
Source: Mozilla Firefox KB Completely Reset Firefox to defaults Security certificate and device settings.

These items and settings will be removed: Add-ons stored in other locations, such as plugins, will not be removed but any modified preferences (such as plugins you have disabled) will be reset. The refresh feature works by creating a new profile folder for you while saving your important data.Īdd-ons which are normally stored inside the Firefox profile folder, such as extensions and themes, will be removed. Click “Refresh Firefox”, and click Finish in the next dialog.Īll of your Firefox settings and personal information are stored in a profile folder. It tells you that refreshing Firefox will remove your add-ons, customizations and restores default browser preferences. Start Firefox, type about:support in the address bar and press ENTER.
