Firstly install foxmarks – this provides a firefox addon which allows you to upload/sync your bookmarks with foxmarks site, however it’s nice that they’ve also added a way by which you can add your own server (either ftp, http, or https) to upload them too!

This is as simple as configuring webDAV:-

 <Location /webdav>
           DAV             On
           AuthType        Digest
           AuthName        "webdav-example"
           AuthDigestFile  /home/www/digest-password
           Require         valid-user
 </Location>

Then configure the foxmarks client to use your username/password and the URL that you’ve set up above – when you hit sync you should then see a foxmarks.xml in your webdav’ed directory