Mozilla Firefox allows you to set a Master password to protect your locally stored usernames, passwords and certificates. Its an extra security mechanism and can protect your sensitive data.
But what will you do if you forget the master password? In that case, following simple steps will help you in resetting it. But remember resetting master password will also remove all locally saved usernames, passwords and certificates.
1. Open Mozilla Firefox and enter following URL in addressbar:
2. It'll show you a page with a warning that all stored data will be removed and "Reset" button at bottom.
3. Click on "Reset" button and it'll immediately reset the master password.