Web/API/StorageManager

Secure contextThis feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The StorageManager interface of the the Storage API provides an interface for managing persistance permissions and estimating available storage. You can get a reference to this interface using either navigator.storage or WorkerNavigator.storage.

Methods

StorageManager.estimate() Secure context

Returns a Promise that resolves to a StorageEstimate object containing usage and quota numbers for your origin.

StorageManager.persist() Secure context

Returns a Promise that resolves to true if the user agent is able to persist your site's storage.

StorageManager.persisted() Secure context

Returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Specifications

Specification	Status	Comment
StorageThe definition of 'StorageManger' in that specification.	Living Standard	Initial definition.

Browser compatibility

The compatibility table on 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.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
StorageManager	Chrome Full support 48	Edge Full support ≤79	Firefox Full support 57 Full support 57 No support 51 — 57 Notes' Disabled' Notes' See bug 1304966 and bug 1399038. Disabled' From version 51 until version 57 (exclusive): this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 48	Chrome Android Full support 48	Firefox Android Full support 51 Notes' Disabled' Full support 51 Notes' Disabled' Notes' See bug 1304966 and bug 1399038. Disabled' From version 51: this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 5.0
estimate	Chrome Full support 52	Edge Full support ≤79	Firefox Full support 51	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 52	Chrome Android Full support 52	Firefox Android Full support 51	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 6.0
persist	Chrome Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: requestPersistent	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: requestPersistent	Chrome Android Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: requestPersistent	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 6.0 Full support 6.0 No support 5.0 — 6.0 Alternate Name' Alternate Name' Uses the non-standard name: requestPersistent
persisted	Chrome Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: persistentPermission	Edge Full support ≤79	Firefox Full support 55	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: persistentPermission	Chrome Android Full support 52 Full support 52 No support 48 — 52 Alternate Name' Alternate Name' Uses the non-standard name: persistentPermission	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 6.0 Full support 6.0 No support 5.0 — 6.0 Alternate Name' Alternate Name' Uses the non-standard name: persistentPermission

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

See implementation notes.'

See implementation notes.

User must explicitly enable this feature.'

User must explicitly enable this feature.

Uses a non-standard name.'

Uses a non-standard name.

StorageManager by Mozilla Contributors is licensed under CC-BY-SA 2.5.