1. If any application (including browser addons) does not have an OFFLINE import-export-backup function, it has no value to me, does not follow good practices and is poorly designed.

2. Cloud sync may be OPTIONAL for users who clearly need it.
Full import-export (containing complete data to restore the previous state, folders, groups, stars, pins, tasks, etc.) locally to the file is the foundation.
Cloud here, cloud there, some clouds everywhere, but a large group of users do not use clouds for everything (many use self-hosted) and must have access to file backup.

3. Currently, it is not possible to return to v1 as a workaround -> v2 should not be released because it is incomplete.

4. Do not install v2 if you plan to reinstall the OS soon, because you will lose the ability to export your OneTab bookmarks!
I was going to install a new OS in the coming days and now I can't transfer my bookmarks.

Maybe need to look for another addon?

PS: The current look and new features are great, but the lack of FULL file export-import is a bummer...