[Bug 1322333] [NEW] Missing language in Accept-Language field of HTTP requests

[Hadrien]

Public bug reported:

I am running Ubuntu 14.04 (64 bits) in French, and I use Firefox in
French too. My Firefox version is 29.0, tagged as "Mozilla Firefox for
Ubuntu / canonical - 1.0"

Some web sites change their default language according to the HTTP
request field named "Accept-Language". I expect those web sites to offer
me a web page in French, however I always get the English version when
browsing with Firefox.

After some investigation, I discovered that my version of Firefox does
not send an expected value for "Accept-Language".

 - Expected value: fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3
 - Value sent instead: en-US,en;q=0.5

Tests with other browsers:
 - French Chromimum on French Ubuntu 14.04 French: the value is correct
 - French Firefox on French Windows 7: the value is correct.
 - French Chrome on French Windows 7: the value is correct.

Maybe the problem is present with other languages.

I don't know if it is related, but:
 - in Firefox's about:config, the value of intl.accept_languages is: fr, fr-fr, en-us, en
 - in a terminal, the "locale" command shows only fr_FR

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Mozilla
Bugs, which is subscribed to firefox in Ubuntu.
https://bugs.launchpad.net/bugs/1322333

Title:
  Missing language in Accept-Language field of HTTP requests

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1322333/+subscriptions