If you’ve lost your master password in Firefox, you won’t be able to recover it, but you can reset it. Here’s how: * Open Firefox :and go to the address bar. * Type: about:config and press Enter. * Accept the warning by selecting “I accept the risk!” if it appears. * Search for signon.management.page.fileImport.enabled. * Right-click the result and select “Reset.” This clears all saved passwords and encryption keys, so you’ll lose any stored logins but can set a new master password. After resetting, you can set up a new master password under Settings > Privacy & Security > Logins and Passwords.