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Simple Tab Groups vs Tab Stash: catalog facts
Simple Tab Groups	Tab Stash
Free Free open-source extension.	Free Free and open source under the GPL.
Browser extension	Browser extension
Keeps many tabs organised into switchable groups Actively maintained with frequent updates	Stashed tabs are plain bookmarks, so they sync and survive uninstalling One click clears a window without losing anything
Firefox only Extra complexity compared with Firefox's built-in tab handling	Firefox only
Browser extension	Browser extension
Open source	Open source
License not stated	License: GPL-3.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.