This is a great add-on. Gotta love those trees.

Because of that it's also much better than Tab Center Redux.

There is just a little thing missing. Make it so "unloaded" (not unread) tabs are visually distinguishable e.g. gray and italic font.
Maybe it's possible with some css in the advanced section but I couldn't figure out the tag for unloaded/pending tabs.
".tab.pending .label ..." doesn't work apparently

PS: Got it. It's "discarded". So if you want to give unloaded/pending/discarded tabs grey labels use this:
.tab.discarded .label {
color: grey !important;
}

5*