First search for the Dolphin HD Browser in the market and download to your Droid. Once installation is complete you can navigate back to the market to search for "Xmarks Dolphin" and install the plugin. After launching the Dolphin Browser, you can swipe the screen to the left to view the extensions toolbar, where Xmarks should now appear:
Tapping on the icon allows you to login to your account and initiate syncing of your stored bookmarks:
Once synchronization is complete, you can swipe to the right to view your Bookmarks bar. Tapping on a bookmark entry launches it in the Dolphin browser.
To view your bookmarks in folder format, you can either tap 'Bookmarks' at the bottom of the Bookmarks bar, or you can swipe left, click on the gear icon, and tap 'Bookmarks'.