Item logo image for Cross-Origin Storage

Cross-Origin Storage

Item media 2 (screenshot) for Cross-Origin Storage
Item media 1 (screenshot) for Cross-Origin Storage
Item media 2 (screenshot) for Cross-Origin Storage
Item media 1 (screenshot) for Cross-Origin Storage
Item media 1 (screenshot) for Cross-Origin Storage
Item media 2 (screenshot) for Cross-Origin Storage

Overview

Implements the proposed Cross-Origin Storage API for sharing files across sites with consent.

Modern web applications often rely on very large files. By default, a web browser downloads a separate copy of these files for each website that uses them. This process can lead to slower load times, increased data consumption, and the use of significant local disk space for storing duplicate copies. This extension creates a shared storage system within the browser, based on a proposed new Web standard. When a website needs a large, common file (like an AI model), it can, with your permission, check if that file has already been downloaded and stored by another website. If an identical copy is found, the website can use the local file instead of downloading it again. Key Features & Benefits: • Faster Load Times: Websites can load more quickly by using large files that are already available on your device, bypassing the need for a new download. • Reduced Data Usage: By eliminating redundant downloads of the same files across different websites, the extension helps conserve your internet data. • Efficient Disk Space: Only one copy of a shared file is stored locally, preventing the accumulation of duplicate files and saving space on your computer's storage. • User-Controlled Permissions: Websites cannot access the shared storage without your explicit approval. The extension will ask for your permission before a site can check for or use a shared file. • File Integrity: The system uses cryptographic hashes to verify that the contents of a shared file are exactly what the website expects and have not been modified, ensuring security. • Lower Energy Consumption: Reducing the amount of data transferred over the network contributes to lower overall energy use. (Source code on GitHub: https://github.com/web-ai-community/cross-origin-storage-extension.)

Details

  • Version
    0.1.22
  • Updated
    July 16, 2026
  • Offered by
    Web AI Community
  • Size
    98.28KiB
  • Languages
    English (United States)
  • Developer
    ℅ Thomas Steiner
    1600 Amphitheatre Pkwy Mountain View, CA 94043 US
    Email
    web-ai-community@chromium.org
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

Related

Get Authorization Token

4.0

Fetch and copy the Authorization token from website requests

StorageNinja

5.0

Chrome Extension to manage Local Storage, Session Storage, and Cookies for the active tab

Download Helper for File Hosts

1.0

Generate download links for most major file hosts. Official Storage Portal(storage-portal.com) extension.

idb-crud

3.9

An open-source Chrome extension for managing various types of browser storage and databases with an intuitive interface

Local File Server

2.0

Serve local files via "http://localhost/" URLs.

Cookie Editor & Storage Manager

5.0

Manage cookies, localStorage, and sessionStorage from a Chrome side panel with search, bulk delete, and JSON import/export.

GitHub File Uploader

5.0

Upload files to GitHub, manage repositories, change visibility, and create pull requests with drag-and-drop interface

GitHub Directory Downloader: Download Folders, Files & ZIPs

5.0

Download any GitHub folder, directory or file as a ZIP. Fast local packaging with private repository token support.

Web Page Downloader

4.2

Web Page Downloader allows you to download and save entire web pages, including linked resources, for offline viewing.

All Links Downloader

3.1

Download all files/links from any web page. Includes URLs direct download and Bulk Link Scraper for multiple pages!

ArchiveBox

5.0

Collect URLs and preserve them using a remote ArchiveBox server

Save All Resources

5.0

Automatically captures all resources loaded by any webpage and saves them as a ZIP file

Get Authorization Token

4.0

Fetch and copy the Authorization token from website requests

StorageNinja

5.0

Chrome Extension to manage Local Storage, Session Storage, and Cookies for the active tab

Download Helper for File Hosts

1.0

Generate download links for most major file hosts. Official Storage Portal(storage-portal.com) extension.

idb-crud

3.9

An open-source Chrome extension for managing various types of browser storage and databases with an intuitive interface

Local File Server

2.0

Serve local files via "http://localhost/" URLs.

Cookie Editor & Storage Manager

5.0

Manage cookies, localStorage, and sessionStorage from a Chrome side panel with search, bulk delete, and JSON import/export.

GitHub File Uploader

5.0

Upload files to GitHub, manage repositories, change visibility, and create pull requests with drag-and-drop interface

GitHub Directory Downloader: Download Folders, Files & ZIPs

5.0

Download any GitHub folder, directory or file as a ZIP. Fast local packaging with private repository token support.

Google apps