====== Firefox ======
===== Configuration =====
==== Change language ====
Open the config via addressbar
about:config
Download and add to firefox
https://addons.mozilla.org/en-US/firefox/addon/english-us-language-pack/?src=dp-dl-othersby
Search or add new string if not found
intl.locale.requested
Enter your lang as value
en_us
Restart FF