Use also duckduckgo for real answers. For redirect email.
Btw, good start: VPN needed, better live/dualboot: VM i haven't checked if/what windows sees etc. Use Kali, awesome save, Don't get arrogant cause you nice config, Google sees/saves all.

Sync means when Gmail acc, goes auto to Onedrive, Windows also autosync to cloud....

@yuki301 Speed Dials are not even synced directly, you access speed dials from synced installations using Other Speed Dials in opera://bookmarks.

All I can tell you is what happened. I had a fully developed Opera running as default browser in Windows 10.

I created a Linux system in a virtual box inside Windows, and installed Opera on it. Opera was virginal, no bookmarks, as expected, and only the default speed dial based on region, which I deleted.

I turned on sync in the Windows Opera, and in the Linux Opera.

Within minutes, I had no speed dial entries on the Windows Opera. It had been synced to virginity by the Linux Opera.

Hence my previous question ... what the hell gets synced to what, and how can that be controlled? Without this understanding, the whole thing is a crapshoot. And shame on Opera for not making the Speed Dial portable! I would rathther have had the sync work from Windows TO Linux, of course.

@yuki301 There is no master or slave as far as I know.
It sends data to the server and get data from there.

https://help.opera.com/en/latest/features/#sync

Anyway, it's always a good measure to make backups of data that is important to you.

The above goes without saying.

And, to be sure, Opera has no idea what it's doing here. When I turned on sync in Linux Opera (already had it on in Windows) since my new Linux Opera speed dial was unpopulated, it quickly unpopulated my carefully laid out speed dial in Windows.

It seems No One knows how to use this, or what to expect. Opera ... is failing, here.

https://help.opera.com/en/latest/features/#sync

Anyway, it's always a good measure to make backups of data that is important to you.

Sync means, essentially, make changes that keep one the same as the other. So A is to be kept like B, or vice versa. It won't work at all unless either A becomes a clone of B, or vice versa. But which is the master and which is the slave?

Potentially, without knowing the protocol, I could really end up with nothing, as a pristine instance of Opera on Linux could be used to make my main Opera in Windows, which contains a lot of useful stuff I'd like synced to Linux, as pristine as the Linux instance of Opera is now. That would be horrible.

I would *think that the instance one is currently using would be the master. But then how would you turn on sync in a new instance, without losing everything?