I've recently moved from Firefox to Opera (for performance issues).
I used to protect my passwords in Firefox with a Master Password. But Opera, so it appears, lacks such feature.
I use Debian 9.7 and Windows 10 and intend to use Opera in both. And I am not worried about someone accessing my machine running and unlocked. It would be more a case of the laptop getting astray, but disconnected.
If someone accessed my computer using a live-CD, would he be able to access passwords saved by Opera? Is Opera safe regarding saved passwords?