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The `Save-Data` request header: https://developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/save-data https://developers.google.com

• uxamanda 7y ago
  Interesting. That is a separate experimental low-data setting that's been around for a while in Chrome, but isn't supported by Safari [0]. Haven't run across it before, thanks! For low data mode specifically, looks like you can easily get "allowsConstrainedNetworkAccess" from an iOS app [1], but don't see anything comparable available for Safari or Firefox. [0] https://caniuse.com/#search=save-data https://caniuse.com/#search=save-data [1] https://developer.apple.com/videos/play/wwdc2019/712/ https://developer.apple.com/videos/play/wwdc2019/712/ Edit: typo