Save-Data: on

Name: Save-Data: on
Rating: 4.3333 (30 reviews)
Author: Aleksandersen

By: Aleksandersen

Automatically enable data-savings mode on compatible websites.

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Features & Capabilities

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.

User Growth & Download Statistics

Add-on Privacy & Security

By:

Daily users:

Rating:

Version:

1.1.0 Last updated: 2021-06-11

Version code:

5249607

Creation date:

2017-05-07

Risk:

Permissions:

Size:

22.82KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 3,189 ▲ 2

Other rankings

#2 in x data keyword 11

#3 in data keyword 54

#13 in save keyword 59

#55 in sale keyword 38 ▼ 1

#62 in date keyword 14 ▲ 1

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Other platforms

Save-Data: on (v1.1.0)

70,000 4.00

(29)

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Aleksandersen

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/save-data/

Website:

https://www.daniel.priv.no/web-extensions/save-data.html

User Reviews

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.

Recent reviews

The plugin should have a manual list of websites/domains that are excluded from adding the Save-Data header, as it can sometimes cause certain websites/domains to malfunction; I've encountered this.

by Oc*****, 2026-01-14

Notice a real improvement in audio & video streaming on my low spec bay trail 2in1, and my ancient macbook osx lion Just 2gb of ram.

by Fi*****, 2025-08-24

Simple and effective.

by Lu*****, 2024-05-13

View all user reviews ›

Is Save-Data: on Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Save-Data: on requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Save-Data: on has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******