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Save the tabs to a bookmark group and switch between different groups.

(Work in progress)

This extension can save the currently opened tabs to a bookmark group, and switch between different groups. Compared with typical tab grouping extensions based on tab hiding, this is found to be lighter on resources and have less conflicts.

Notes:

• The option Restore previous section must be enabled in Firefox preferences, to make sure the tabs are not lost after restart. Extensions cannot write bookmarks during browser exit.