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Simple Tab Groups vs Sidebery: catalog facts
Simple Tab Groups	Sidebery
Free Free open-source extension.	Free Free and open source under the MIT licence.
Browser extension	Browser extension
Keeps many tabs organised into switchable groups Actively maintained with frequent updates	Panels can be bound to containers, keeping work and personal tabs apart Built-in snapshots restore a previous tab layout
Firefox only Extra complexity compared with Firefox's built-in tab handling	Firefox only The number of settings makes first setup slow
Browser extension	Browser extension
Open source	Open source
License not stated	License: MIT
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.