del.icio.us inbox in Firefox's sidebar

Firefox → Bookmarks menu → Manage Bookmarks → New Bookmark →

del.icious inbox bookmark

→ Bookmarks Toolbar Folder

That will create a bookmark that loads your del.icio.us inbox (or del.icio.us/popular if you prefer) in the sidebar, for easy browsing.


@-moz-document url-prefix(http://del.icio.us/inbox){
 .right { display: none !important; }
}
will hide the subscriptions list.