Awesome!
Fast, minimalist, feature-rich and truly deserving of the term "fully customisable".

Edit: Unfortunately, uploading a custom image to Bonjourr doesn't seem to work when firefox is said to its strictest privacy settings. Specifically setting the History setting to no history / permanent private browsing seems to be the issue.
Though I am not sure whether this is a limitatation of the setting or an oversight of the plug-in.