tabs.Tab

The type tabs.Tab contains information about a tab. This provides access to information about what content is in the tab, how large the content is, what special states or restrictions are in effect, and so forth.

Type

Values of this type are objects. They contain the following properties:

active

boolean. Whether the tab is active in its window. This may be true even if the tab's window is not currently focused.

audible Optional

boolean. If the tab is not muted: whether the tab is producing sound. If the tab is muted: whether the tab would be producing sound, if it were not muted.

favIconUrl Optional

string. The URL of the tab's favicon. Only present if the add-on has the "tabs" permission. It may also be an empty string if the tab is loading.

height Optional

integer. The height of the tab in pixels.

highlighted

boolean. Whether the tab is highlighted.

id Optional

integer. The tab's ID. Tab IDs are unique within a browser session. The tab ID may also be set to tabs.TAB_ID_NONE for browser windows that don't host content tabs (for example, devtools windows).

incognito

boolean. Whether the tab is in a private browsing window.

index

integer. The zero-based index of the tab within its window.

mutedInfo Optional

tabs.MutedInfo. The current muted state for the tab and the reason for the last state change.

openerTabId Optional

integer. The ID of the tab that opened this tab, if any. This property is only present if the opener tab still exists.

pinned

boolean. Whether the tab is pinned.

selected

boolean. Whether the tab is selected.

sessionId Optional

string. The session ID used to uniquely identify a Tab obtained from the sessions API.

status Optional

string. Either loading or complete.

title Optional

string. The title of the tab. Only present if the add-on has the "tabs" permission.

url Optional

string. The URL of the document that the tab is displaying. Only present if the add-on has the "tabs" permission.

width Optional

integer. The width of the tab in pixels.

windowId

integer. The ID of the window that hosts this tab.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Compatibility notes

Edge

• 'highlighted', 'selected', and 'openerTabId' are not supported.

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