Either you wait a bit longer and have fully working totally integrated bugfree tabbed conversation windows, or you use an outdated not anymore updated plugin which would still work but not 100%
the tabbed features work great at the moment (by great i mean 5000 X better than any previous plugin/addon) it even changes colour to match your msn colour!
I hope that you can change button behaviour in final to close on middle click like in firefox
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