How to change the Firefox interface language

Directly from the General pane it's now possible to switch between languages already available in Firefox, removing the need for manually setting preferences.

Click the menu button ☰ Menu and select Options . In the Language section of the General panel, choose a language in the drop-down menu. ...

Firefox lets you display menus, notifications, messages and other parts of the Firefox interface in different languages.

The only way to switch the language is by modifying intl.locale.requested on the about:config page. You need to close and restart Firefox to make the change ...

In the General panel, scroll down to Language under Language and appearance. Click the Choose button next to Choose your preferred language for ...

Select Tools > Options. On the Content tab, under the Languages section click Choose. From the Select a language to add menu, select a language .

Changing the language in the browser settings (General > Language and Appearance > Language) works as expected for me (release version on Linux).

I would like to switch my interface language to English (in the Developer Edition version). I already installed the English US language pack ...

How to Change Mozilla Firefox Browser Language [Guide] If you ... Firefox interface in a language of their choice. For instance, you ...