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List, open, close, or activate tabs across all windows. Select a listed tabId to target a shared tab. Without tabId, tools use the agent’s own usable tab or the only usable tab; multiple shared tabs require an explicit choice. Open a new tab only when the task needs a separate page. Never launch a separate browser just to get a tab. Dev-mode tabs are always usable.

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Parameters

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enum
default:"list"
required
One of: list, new, close, activate.
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integer
Target tab id from browser_tabs, which lists tabs across all windows. Defaults to the agent’s most recently opened usable tab, or the only usable tab. Otherwise select a listed tabId.
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string
URL for new
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enum
Where to open a new tab; default dev if running, else extension One of: extension, dev.
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string
Developer context for new
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boolean
Default true. false lists every tab including unshared ones.

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Example

List usable tabs
Open a page in the user's window