To use these add-ons, you'll need to download Firefox.

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Iceggiren i Tree Style Tab

Tree Style Tab sγur Piro (piro_or)

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Icegger-it Aseqdac Firefox 13470586
sɣur Aseqdac Firefox 13470586, 7 jierren lyn
I installed it because I read it could place my Tabs back to the Bottom, but it can't .
Don't know if it has any other useful features ( seems to be too Complex for a "Normal" User )