Manage local site storage settings

Revision Information
  • Revision id: 147747
  • Created:
  • Creator: AliceWyman
  • Comment: updated for fx56, fx57
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
  • Readied for localization:
  • Readied for localization by: AliceWyman
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Some websites have the ability to store information, such as files, in your local storage, and these files can only be removed manually by you. This helps the website run faster and prevents information from being lost if you lose your connection. This feature is enabled by storage API.

When a website has storage API, Firefox will first ask you for permission to let a website add files to your local storage.

When the prompt appears in your address bar, choose “Allow” or “Don’t Allow”.

notification storage api

What if my storage is full?

You’ll see a prompt at the top of the page letting you know that your storage is full. Click the OptionsPreferences button to manage your storage. Freeing up space on your disk by deleting files can also free up storage for Firefox.

notification bar storage api

I want to modify or turn off this setting

  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Click the Advanced panel on the left, then click on the Network tab.Privacy & Security panel on the left, then go down to the Security section.
  3. Under the Offline Web Content and User Data section, remove the checkmark from the box in front of Tell you when a website asks to store data for offline use. You can also clear all the saved data by clicking Clear Now.
  1. Click the menu button New Fx Menu Fx57Menu and choose Options.Preferences.
  2. Click the Privacy & Security panel on the left.
  3. Under Site Data, click Settings to change your site storage API settings. You can also clear all the saved data by clicking Clear all Data.