Defines zoom settings for a tab: modescope, and default zoom factor.


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

number. The default zoom level for the current tab. Note that this is only used in tabs.getZoomSettings.
tabs.ZoomSettingsMode. Defines whether zoom changes are handled by the browser, by the add-on, or are disabled.
tabs.ZoomSettingsScope. Defines whether zoom changes will persist for the page's origin, or only take effect in this tab.

Browser compatibility

Chrome Edge Firefox Firefox for Android Opera
Basic Support Yes No 45.0 No 33


This API is based on Chromium's chrome.tabs API. This documentation is derived from tabs.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

 Contributors to this page: Jeremie, wbamberg
 Last updated by: Jeremie,