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interTabs puts every new tab into the right tab group, organizes the mess in one click, and saves groups for later.
New tabs join the group they belong to. Two related tabs with no group yet? interTabs starts one and names it. Drag a tab yourself and it stays where you put it.

Organize sorts every loose tab into named groups in about a second. Tabs that fit an existing group join it.
Save a group and close it. Reopen it in this window or a new one whenever you're ready.
Groups are named for what you're doing, and the name updates as the group grows. Rename one yourself and it's yours.
