# Save-Data: on

> Automatically enable data-savings mode on compatible websites.

Canonical page: [https://chrome-stats.com/d/save-data](https://chrome-stats.com/d/save-data)

## Overview

- **ID:** `save-data`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Aleksandersen
- **Category:** other
- **Daily users:** 1,026
- **Weekly downloads:** 26
- **Rating:** 4.23 / 5 (31 ratings)
- **Version:** 1.1.0
- **Last updated:** 2021-06-11
- **First published:** 2017-05-07
- **Size:** 23 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/save-data/)
- **Website:** [https://www.daniel.priv.no/web-extensions/save-data.html](https://www.daniel.priv.no/web-extensions/save-data.html)

## Description

## Save-Data: on Chrome Extension

Save-Data: on is a lightweight Chrome extension designed to help users save data usage while browsing. When enabled, it sends the `Save-Data: on` HTTP header with every request to signal to compatible websites that you prefer a reduced data experience. This often results in lower quality images and fewer media elements, cutting down on data downloads and associated costs.

Unlike data compression proxies such as Chrome's Data Saver, Opera Turbo, or Yandex Turbo, Save-Data: on does not modify the content via proxies but relies on websites' support to adjust content delivery based on the header. It's a simple yet effective way to optimize your browsing experience and conserve bandwidth automatically on supported websites.

## Rankings

- #3,258 — Overall
- #2 — data
- #2 — x data
- #15 — save
- #60 — sale
- #69 — date

## Permissions and access

### Permissions

- `<all_urls>`
- `webRequest`
- `webRequestBlocking`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users generally report the add-on is simple, reliable, and improves streaming/speed on low-end devices. It helps manage data usage by signaling sites to reduce data. However, users want an exclude/whitelist to prevent site breakage, question its overall data-saving effectiveness, and request a UI toggle to enable/disable the extension more easily.

### Pros

- Notable improvement in streaming and overall speed on low-spec hardware.
- Simple and effective to use.
- Stable and reliable in practice; extension works well for many users.
- Helps reduce data usage by signaling sites to optimize (Save-Data header).
- Beneficial for limited data scenarios like satellite Internet.

### Cons

- Lacks an exclude/whitelist feature to prevent site breakage; need a manual list of excluded sites.
- Perceived limited effectiveness since it doesn't directly reduce data usage, it mainly signals sites to optimize.
- No built-in on/off toggle in Firefox; some users would prefer easy enable/disable and rely on the extension because Firefox lacks a corresponding setting.

## Similar extensions and apps

- [Toggle Save-Data Header](https://chrome-stats.com/d/toggle-save-data-header)
- [Smart Data Saver](https://chrome-stats.com/d/smart-data-saver) — 2 users, 2.00 / 5
- [low—web](https://chrome-stats.com/d/low-web-extension) — 71 users, 4.33 / 5
- [Lite Saver](https://chrome-stats.com/d/lite-saver) — 1 users
- [Bandwidth Hero](https://chrome-stats.com/d/bandwidth-hero) — 64 users, 3.85 / 5
- [Save All Resources](https://chrome-stats.com/d/save-all-resources) — 423 users, 5.00 / 5
- [Web Optimizer DOS](https://chrome-stats.com/d/web-optimizer-dos) — 2 users
- [Auto Save HTML](https://chrome-stats.com/d/auto-save-html) — 251 users, 4.11 / 5
- [whyEXT Image Quick Save](https://chrome-stats.com/d/whyext-image-quick-save) — 6 users
- [Easly Save It](https://chrome-stats.com/d/easly-save-it) — 2 users
- [AMP Browser Extension](https://chrome-stats.com/d/amp-browser) — 71 users, 3.00 / 5
- [SaveSync](https://chrome-stats.com/d/savesync) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/save-data)