Chrome Tab Groups API: Group Tabs and Manage Their State

Separate membership from group appearance

Call chrome.tabs.group({ tabIds }) to create a group from selected tabs, or pass groupId to add tabs to an existing group. The call returns the group ID. Then chrome.tabGroups.update(groupId, { title, color }) can name and color that group. The tabGroups namespace itself does not add tabs to a group.

To remove selected tabs from their groups, call chrome.tabs.ungroup(tabIds). If a group becomes empty, Chrome removes it. Build the UI around this lifecycle rather than assuming every saved project always has a live browser group.

• Chrome Tab Groups API
• Chrome tabs.group and tabs.ungroup

Request only the permission the feature needs

Chrome documents tabGroups as a named permission for reading or changing group properties. A feature that only creates groups through chrome.tabs.group has different needs from one that queries titles, colors or collapse state. If the UI also reads tab URLs and titles, evaluate tabs or host access separately.

Explain to the user which part of the feature touches browser groups and which part reads page metadata. A single vague 'manage all tabs' message hides those distinctions.

• Tabs API permissions explained

Do not persist group IDs as project identity

Chrome says group IDs are unique within a browser session. After a restart, a saved project should be reconnected by its own record ID and source URLs, not by an old groupId. Query live groups on demand and treat a missing group as a normal state.

Groups can also move between windows or disappear when closed. Listen for group events when the interface needs to update, but reconcile with current tabs and groups before a consequential action.

Account for window boundaries

Each TabGroup has a windowId. When grouping selected tabs, verify they are in a compatible window and choose the destination deliberately. If you must reorganize tabs across windows, move them first and check the result before grouping.

A group that moves between windows may be reported as removed from one window and created in another rather than a simple move event. Code that assumes a stable group ID and one event type can lose track of it.

• Chrome windows API guide

Idea: task groups with durable notes

Create a named Chrome group for the pages needed now, and pair it with a durable project note containing purpose, findings and next action. The group is a convenient live arrangement; the note is the record that survives changes in the tab strip.

When the user returns, preview which saved links are already open, then offer to build a fresh group. This avoids treating a closed group as lost research.

• Tab groups versus saved sessions

Test the group lifecycle

Create a group, rename it, collapse it, move tabs out, close the last tab and restart Chrome. Confirm the UI shows the current state and does not reuse a stale group ID.

Include a case where the user manually renames or moves a group while the extension is open. Respect the user's browser changes instead of silently reverting them to an old saved value.