I just released Google Bookmarks Button 0.2 for Firefox, the new version includes:

- Some bug fixes.
- Quick Add/Remove bookmarks by clicking in the star button (you can open the add bookmark dialog if you press ctrl while clicking the star).
- Context menus for labels (Open all bookmarks in tabs) and bookmarks (Remove and Edit) and drag & drop functionalities so now you can add a Google Bookmark by dragging any link or Firefox Bookmark into the GBB menu, and move Google Bookmarks between labels.

Download at: http://www.menjatallarins.com/extensions/#gbb

PD: Probably not a good day to release anything with all the Google Notebook thing but...