It adds a couple of new features and fixes some bugs. The previous version was reviewed by John Ford
from AMO, and I've taken his comments into account.
The most noticeable new feature is "Ignore Paused Transfers" option. With this, the progress-bar will only take running transfers into account (running doesn't mean 'with a greater-than-zero transfer rate', just not-paused). Also, if the MLDonkey server URL is incorrect or inaccesible, it will show a message in the statusbar stating so.
Now I need a couple of reviews... so, if anyone has a moment, I'd really apreciate it. With reviews, I can nominate DonkeyFire to become PUBLIC in addons.mozilla.org

Just search for donkeyfire in the AMO Sandbox. You need an account at http://addons.mozilla.org to see the sandbox.
Thanks!