You didn't provide a lot of detail so I'm going to assume you somehow synced bookmarks with the default browser. The first thing to do would be to uninstall any bookmark sync app you may have installed. Make certain, if you are using Chrome on your desktop that you have told it not to sync in the settings. Then go to settings - apps - all and find "Browser". Tap it and tell it to clear cache and settings then force close and restart your tablet.