pull down to refresh

Just downloaded and tested the extension on Brave. overall look's working and am able to send and receive no problem.
When switching version to Beta I lost all transactions history.. so I assume a new wallet is created. Surprisingly, I found old transactions when switching back to Prod version
The same data is accessible via browser on wallte.nutstush and alpha.nustash web version, so I assume... is all the data stored only in the browser cache?