KBrowser stores all of its information in a desktop files, in the Waterfox default directory. You can find the path in your Settings > General file. The Settings dialog can be launched via the “wheel” icon in the bottom left of the toolbar.
We recommend that you store this file in a different location, simply because if for some reason you decide to re-set your Firefox browser you won’t lose this file.
You can also store this file in the cloud and access it from any computer. This way you are always in sync on multiple computers. Just note that you can not access the same file simultaneously from multiple computers.