Save-Data: on

Only for name didn't work

Bless you, I'm on a satellite internet and burn through my allotted data about a week early each month, this will help!

For now under test. But I'm really enjoying the speed.

2017-12-05　最新のFirefoxで試しましたが、URL先頭に Save-Data:をつけてもページ遷移しませんでした。

Stable and works fine than data saver proxy...

Doesn't actually reduce your data usage per say, but does as advertised: it informs websites that you're data conscious and want them to make an effort to reduce their impact on your data usage.