All in all: good idea but problematic expirience.
It deleted my hidden bookmarks - probably in a sync between two machines running at a same time, but there is an option to RESTORE bookmarks so it is not the end of the world. Can't wait to see it fixed.

It seems the function to "sync bookmarks and preferences across devices" is broken as of at least Firefox 84. While it was enabled, I was unable to make any changes to the bookmarks I had (anything I added, deleted, renamed, ...) was reverted everytime I closed Firefox. With that feature off, it seems to be working fine. A little less useful than before, but better than not working any more at all. :-)

we all know why we need this

I appreciate this for existing and thank you mr. rharel for making this exist! 10/10 very simple, easy to use, work as intended!

Muito bom

just getting started with this, but seems promising, well done! was hoping to get some stats on number of bookmarks/folders and last bookmarked/date stats. When I copied and pasted a folder of bookmarks it took a long time to populate in the private bookmarks folder, why is that? I think it got all of them though, but for a sec it looked like it only got a few as it was copying them over.

edit: oof ok, so it does show that I have 2630 tabs that I copied in there, but I don't understand why locking and unlocking takes so long, is it the encryption/decryption? It takes over a minute to unlock and populate the folder and the restore progress counter (i.e. ###/2630) goes away if I click away and it is replaced by the lock option again. If I lock while it is restoring that seems like it would be bad and then if I put a new bookmark in there while it is still restoring would that not be good either? I'm guessing this won't scale out well if I have to load more and more bookmarks in there, maybe it was just designed for a few bookmarks