Origin header is supported on Firefox from version.59

[lin826]

The README might be able to update with the present situation.

Reference: https://bugzilla.mozilla.org/show_bug.cgi?id=1424076#c15

[skeggse]

Will need to do some testing to confirm; thanks for letting us know! (If you'd like to do the testing, you're welcome to!)

[lin826]

I hadn't get time to test on this feature. But refer to MDN Origin is sent with non-CORS requests since Fx59, unless they are GET or HEAD.

To perform the same as the other browsers, there is a manual setting in preference of Firefox browser, not default to be true though 😞