Bug#873672: firefox-esr: "accept-language" HTTP header is incorrectly send by default

Tue Aug 29 12:49:52 UTC 2017

Package: firefox-esr
Version: 52.3.0esr-2
Severity: important

Dear Maintainers,

After a standard Debian net-install using French locale, the Firefox
HTTP header "accept-language" is correctly set to "fr, fr-fr, en-us, en"
(as seen in intl.accept_languages in about:config).

However, the *sent* value is "en-US,en;q=0.5" (as seen in any website
that show visitors' HTTP headers). I believe this is an important
usability problem for non-english speakers, that is why I set the
severity to "important".

The simplest solution to this problem is to open Firefox Preferences and
to go to "Content" -> "Languages" -> "Choose" to change languages to any
order, validate, and then re-change the order back to the right one.

On my setup, I can confirm this simply by starting Firefox with a blank
profile.

Please do not hesitate to ask if I can provide more information, or if I
should report this upstream (I could no find a similar bug report there).

Best regards,
Yvan

-- Package-specific info:

-- Extensions information
Name: Application Update Service Helper
Location: ${PROFILE_EXTENSIONS}/aushelper at mozilla.org.xpi
Status: enabled

Name: Français Language Pack locale
Location:
/usr/lib/firefox-esr/browser/extensions/langpack-fr at firefox-esr.mozilla.org.xpi
Package: firefox-esr-l10n-fr
Status: enabled

Name: Multi-process staged rollout
Location: ${PROFILE_EXTENSIONS}/e10srollout at mozilla.org.xpi
Status: enabled

Name: Pocket
Location: ${PROFILE_EXTENSIONS}/firefox at getpocket.com.xpi
Status: enabled

Name: Privacy Badger
Location: ${PROFILE_EXTENSIONS}/jid1-MnnxcxisBPnSXQ at jetpack.xpi
Status: enabled

Name: Thème par défaut theme
Location:
/usr/lib/firefox-esr/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi
Package: firefox-esr
Status: enabled

Name: Web Compat
Location: ${PROFILE_EXTENSIONS}/webcompat at mozilla.org.xpi
Status: enabled

-- Plugins information
Name: GNOME Shell Integration
Location: /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so
Package: gnome-shell
Status: enabled

Name: IcedTea-Web Plugin (using IcedTea-Web 1.6.2 (1.6.2-3.1))
Location: /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
Package: icedtea-8-plugin:amd64
Status: enabled

Name: iTunes Application Detector
Location: /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so
Package: rhythmbox-plugins
Status: disabled

-- Addons package information
ii  firefox-esr    52.3.0esr-2  amd64        Mozilla Firefox web browser
- Ext
ii  firefox-esr-l1 52.3.0esr-2  all          French language package for
Firef
ii  gnome-shell    3.22.3-3     amd64        graphical shell for the
GNOME des
ii  icedtea-8-plug 1.6.2-3.1    amd64        web browser plugin based on
OpenJ
ii  rhythmbox-plug 3.4.1-3      amd64        plugins for rhythmbox music
playe

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8),
LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox-esr depends on:
ii  debianutils               4.8.2
ii  fontconfig                2.12.3-0.2
ii  libasound2                1.1.3-5
ii  libatk1.0-0               2.24.0-1
ii  libc6                     2.24-14
ii  libcairo-gobject2         1.14.10-1
ii  libcairo2                 1.14.10-1
ii  libdbus-1-3               1.11.16+really1.10.22-1
ii  libdbus-glib-1-2          0.108-2
ii  libevent-2.1-6            2.1.8-stable-4
ii  libffi6                   3.2.1-6
ii  libfontconfig1            2.12.3-0.2
ii  libfreetype6              2.8-0.2
ii  libgcc1                   1:7.2.0-1
ii  libgdk-pixbuf2.0-0        2.36.5-2
ii  libglib2.0-0              2.53.4-3
ii  libgtk-3-0                3.22.18-1
ii  libgtk2.0-0               2.24.31-2
ii  libhunspell-1.6-0         1.6.1-2
ii  libjsoncpp1               1.7.4-3
ii  libnspr4                  2:4.16-1
ii  libnss3                   2:3.31-1
ii  libpango-1.0-0            1.40.6-1
ii  libsqlite3-0              3.19.3-3
ii  libstartup-notification0  0.12-4+b2
ii  libstdc++6                7.2.0-1
ii  libvpx4                   1.6.1-3
ii  libx11-6                  2:1.6.4-3
ii  libx11-xcb1               2:1.6.4-3
ii  libxcb-shm0               1.12-1
ii  libxcb1                   1.12-1
ii  libxcomposite1            1:0.4.4-2
ii  libxdamage1               1:1.1.4-3
ii  libxext6                  2:1.3.3-1+b2
ii  libxfixes3                1:5.0.3-1
ii  libxrender1               1:0.9.10-1
ii  libxt6                    1:1.1.5-1
ii  procps                    2:3.3.12-3
ii  zlib1g                    1:1.2.8.dfsg-5

firefox-esr recommends no packages.

Versions of packages firefox-esr suggests:
pn  fonts-lmodern          <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-3
ii  libgssapi-krb5-2       1.15.1-2
pn  mozplugger             <none>

-- no debconf information

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