One of the few addons that works with Pinned tab groups.
Allows Load/Hide/Switch of Pinned Tab Groups.

Works great with Simple Tab Groups (STB) to manage load/save/switch tab groups (STB doesn't load/hide pinned tabs).

Doesn't save which container the tabs are in. Always loads tabs in default container.

Works as expected. I do not understand why this isn't standard in any browser. Thank you!

A recommendation:

https://github.com/Drive4ik/simple-tab-groups/issues/286#issuecomment-787110861