sqlite
, indexeddb
, websql
or localstorage
locally on your device. Regardless of which engine, the secret keys are always encrypted with password-based key derived from a PBKDF2 as implemented in the forge module. The only time a secret key is displayed as plain text is when generating a new wallet and when viewing it on the manage accounts
page.GCCVPYFOHY7ZB7557JKENAX62LUAPLMGIWNZJAFV2MITK6T32V37KEJU.
Read more here