If you use the Firefox add-on LJ Hook (found here), you can set it up to work on Dreamwidth as well and it'll do much the same thing. Once you have it installed, pull up a browser page, right click on the page (I usually do it on a dreamwidth page to check that it's working), select LJ Hook, select preferences, select Clones Manager, and just add in dreamwidth.org. That should do it. Hope this helps!