In Mozilla Firefox, passwords stored in the logins.json and key4.db files are encrypted using the Triple DES (3DES) algorithm in CBC (Cipher Block Chaining) mode. The encryption key is further secured, and if a master password is set, this key is encrypted using a key derived from the master password via the PBKDF2 function. This provides an additional layer of protection, although it’s worth noting that 3DES is considered outdated compared to newer standards like AES.
Can Mozilla Team is able implement AES-256 like lastpass used .