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

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