During my mission in Italy, I had to work on a italian computer with Firefox in … Italian (sic).
Obviously, it was not easy for me to understand all the options since I’m used to use Firefox
in English (not in French either). By looking on
- Download the right language pack on https://addons.mozilla.org/en-US/firefox/language-tools/
- Open “about:config”, accept the risks
- Search for “intl.locale.requested” and if it does not exist (it was the case for me), create a new string key named “intl.locale.requested” ;-)
- Change/set the value to your downloaded language pack (ie: en-US, fr-FR, etc.)