Hi, Exactly the same problem with FireFox 47.0 (Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0) on Ubuntu 14.04.4 LTS
with packages: $ dpkg --get-selections |grep firefox firefox install firefox-locale-en install firefox-locale-fr install My pref is: intl.accept_languages : fr, fr-fr, en-us, en Http sent header: Accept-Language : en-US,en;q=0.5 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1527663 Title: firefox 43 Accept-Language header does not follow preferences Status in firefox package in Ubuntu: Confirmed Bug description: on a french firefox, possibly on all non english installs of firefox 43 on Ubuntu 15.10, the Accept-Language header is set to en_US regardless of the language preferences. It started with the upgrade to ff43, and the issue exists event when creating a new profile. How to Reproduce : Create a new profile on a firefox in french, go to any website, Accept-Language HTTP header does not contain "fr" (I could reproduce the bug in a virtualized 15.10) Workaround : about:preferences#content > Languages: choose Change order, click OK Languages: choose (again) Change order back, click OK Now the Accept-Language header is correctly set To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1527663/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

