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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Tiririt sɣur Drive4ik

Tiririt n ineflayen

yeffeɣ-d deg för 8 år sedan
Update to latest version and re-test.
Startup bugs on sync groups with windows was fixed
Which OS you are used?

Update: Please, update Firefox to latest version v61 and after that update addon to STG v3.0 (not experimental)