It's secure to save the password and the credit card info in the dev version?

[Matteo_De_Cristofaro]

It's secure to save personal information in this browser? There's any protection or Encryption?

[#2]

Thank you Matteo for the question, all passwords and credit cards are stored securely.

[#3]

Data is encrypted locally using keys associated with your Windows logon account; see https://chromium.googlesource.com/chromium/src/+/master/docs/security/faq.md#Does-the-Password-Manag... for a bit more detail.