Save-Data: on
Automatically enable data-savings mode on compatible websites.
Save-Data: On - A Firefox Add-On for Data Savings
'Save-Data: on' is a Firefox add-on that works by sending the 'Save-Data: on' HTTP header with every request. It informs websites to minimize data usage, potentially leading to lower quality images and fewer media elements on webpages. Note that it is not a data compression proxy like some modes in other browsers.
Add-on stats
Weekly download count: 26
Firefox on Android: Yes
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- <all_urls>
- webRequest
- webRequestBlocking
Size: 23.37K
URLs: Website
Ranking
Other platforms
Not available on Android
Not available on Edge
Want to check extension ranking and stats more quickly for other Firefox add-ons?
Install
Chrome-Stats extension
to view Firefox-Stats data as you browse the Firefox Browser Add-ons.
Add-on summary
Tell websites that you prefer to save data and costs. At websites’ discretion, you may see lower quality images and fewer media elements as webpages adjust to reduce data downloads.
The extension works by sending the Save-Data: on HTTP header with every request. This extension is not a data compression proxy like the Data Saver option in Google Chrome, or Opera Turbo and Yandex.browser Turbo mode.
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- Simple and effective
- Helps save data usage
- Works as advertised
Cons
- Should have a UI to turn the addon on or off
- Lack of feature such as comparing 'save data & without save data'
- Doesn't actually reduce data usage
Most mentioned
- Works as advertised
- Need for a UI to turn the addon on or off
- Lack of feature such as comparing 'save data & without save data'
User reviews
Simple and effective.
by Luke, 2024-05-13
by utubo, 2023-10-24
Add-on safety
Risk impact
Save-Data: on requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Save-Data: on has earned a fairly good reputation and likely can be trusted.
Upgrade to see risk analysis details