AFAIK, dropbox also needs the internet to work, doesn't it?

But you don’t need the internet to work at the same time as you use the local application with the data previously synced via Dropbox. Of course, in the case of a bookmark manager, the usefulness is limited when the internet isn’t working. :)

I only mentioned dropbox if I wanted to sync my database on multiple computers. I don't need to, so I don't need dropbox.