---
title: tabs.ZoomSettings
slug: Mozilla/Add-ons/WebExtensions/API/tabs/ZoomSettings
tags:
  - API
  - Add-ons
  - Extensions
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - ZoomSettings
  - tabs
browser-compat: webextensions.api.tabs.ZoomSettings
---
{{AddonSidebar()}}

Defines zoom settings for a tab: {{WebExtAPIRef("tabs.ZoomSettingsMode", "mode")}}, {{WebExtAPIRef("tabs.ZoomSettingsScope", "scope")}}, and default zoom factor.

## Type

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

- `defaultZoomFactor`{{optional_inline}}
  - : `number`. The default zoom level for the current tab. Note that this is only used in {{WebExtAPIRef("tabs.getZoomSettings")}}.
- `mode`{{optional_inline}}
  - : {{WebExtAPIRef('tabs.ZoomSettingsMode')}}. Defines whether zoom changes are handled by the browser, by the extension, or are disabled.
- `scope`{{optional_inline}}
  - : {{WebExtAPIRef('tabs.ZoomSettingsScope')}}. Defines whether zoom changes will persist for the page's origin, or only take effect in this tab.

## Browser compatibility

{{Compat}}

{{WebExtExamples}}

> **Note:** This API is based on Chromium's [`chrome.tabs`](https://developer.chrome.com/extensions/tabs#type-ZoomSettings) API. This documentation is derived from [`tabs.json`](https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/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.

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