Ecosia has a browser these days, and I would use if sync profile remained active after clearing of session data.

And for me, Vivaldi works well enough for me to use on a KDE desktop.

I’m using Vivaldi as daily driver with fedora.
3rd party ad blocker.
It syncs for me and its privacy features work as far as I can tell.

Tried ecosia browser recently and like it but wouldn’t retain profile/sync after clearing browser data.
I might be clearing stuff that has nothing to do with browsing data but do same thing with Vivaldi.
I would use ecosia if sync profile worked like Vivaldi.

All browsers sux in their own special ways :)