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

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Iceggiren i Simple Tab Groups

Simple Tab Groups sɣur Drive4ik

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Icegger-it Aseqdac Firefox 14653297
sɣur Aseqdac Firefox 14653297, 6 jierren lyn
It works fine in a single machine, but there is no way (at least no simple way) to make it sync between different machines automatically.