Not really syncing, but overriding
The Extensions do exactly what I need. I am more than happy. But:
I had Bookmarks at Firefox, and I had Bookmarks at Chrome. One of them got deleted, because the Bookmarks don't merge. A pitty.
Idea:
Create different "bookmark-gists". For example one for chrome, one for ff. And add a button to merge them. Merging them is not so difficult. This is, how i managed to bring my FF- and Chrome-Bookmarks together at the end, thanks to your tool.
Well: I am sure, this is not so difficult. The base for an awesome plugin is done.
@ocubist thanks for your idea, it's good idea. I am developing the merging feature, it's a little difficult for me, because merger not only add but also delete. however I found a solution and try to implement.