Fenix: [Bug] Accept-Language headder should contain the users default language instead of en-US

[marcomg]

Steps to reproduce

Use android in another language (in my case Italian), go to a random page with multiple language support (including google.com).

Expected behavior

Menu and content was published in the right language (for me Italian).

Actual behavior

Pages are loaded in English.

I think the fault is in user agent, i can see it is
Mozilla/5.0 (Android 10; Mobile; rv:79.0) Gecko/79.0 Firefox/79.0
and isn't mentioned language.
Firefox menu are in the correct language.

Device information

• Android device:
  Google Pixel 3a
  Android 10 build QQ3A.200805.001
• Fenix version:
  79.0.5 (Build #2015758619)
  AC: 48.0.15, 8755ac0cd
  GV: 79.0.1-20200813192915
  AS: 61.0.10.

[cadeyrn]

The user agent never contains the language. Do you mean the Accept-Language header?

See also #6502.

[marcomg]

Yas I am sorry, I meant the Accept-Language header.
I think I could close as duplicate?

[mcarare]

Duplicate of https://github.com/mozilla-mobile/fenix/issues/6502.
Thank you @marcomg for the report.
And thank you @cadeyrn for the details mentioned, here and on other issues. 🌟