Where Does Tree Style Tab Store Trees and Sessions?
Tree Style Tab keeps tab trees and settings in per-profile Firefox extension storage with session backup.
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Tree Style Tab stores trees in Firefox extension storage inside the active profile. Hierarchy, collapsed states, and options share that space. There is no external session file.
Collapsed subtrees hide the tabs people forget to back up. The session export captures the whole forest as restorable data. Treat it like any important document and refresh it weekly.
Where Tree Style Tab stores this, by platform
%AppData%\Mozilla\Firefox\Profiles\<profile>\storage (per profile)
Trees and settings per Firefox profile. Session backup plus export covers moves. Profile loss without backup is final.
~/Library/Application Support/Firefox/Profiles/<profile>/storage (per profile)
Same storage model on Mac. Restores rebuild hierarchy and collapsed states. Export before profile wipes always.
~/.mozilla/firefox/<profile>/storage (per profile)
Profiles under ~/.mozilla with the same backup workflow. No cloud copy exists. Trees belong to the profile that grew them.
Frequently asked questions
How do I move Tree Style Tab sessions to a new profile?
Use the session backup and export options, then restore on the new profile. Open trees travel as session data. Fresh installs start with a flat empty tree.
Does Tree Style Tab sync across devices?
No. Everything lives in that profile's extension storage. Losing the profile without a backup loses the trees. Export regularly if tabs are your task list.
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