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Sidebery vs Simple Tab Groups: catalog facts
Sidebery	Simple Tab Groups
Best for: Vertical tab tree and bookmarks sidebar with container support	Best for: Firefox users juggling many tabs across separate projects
Free Free and open source under the MIT licence.	Free Free open-source extension.
Browser extension	Browser extension
Panels can be bound to containers, keeping work and personal tabs apart Built-in snapshots restore a previous tab layout	Keeps many tabs organised into switchable groups Actively maintained with frequent updates All 3 strengths for Simple Tab Groups Keeps many tabs organised into switchable groups Actively maintained with frequent updates Translated interface
Firefox only The number of settings makes first setup slow	Firefox only Extra complexity compared with Firefox's built-in tab handling
Browser extension	Browser extension
Open source	Open source
License: MIT	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 Sources for Sidebery addons.mozilla.org/firefox/addon/sidebery github.com/mbnuqw/sidebery Catalog checked September 22, 2026	Official website Full listing and sources Sources for Simple Tab Groups github.com/drive4ik/simple-tab-groups Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.