How to change the language in Mozilla Firefox- release 60.0 and later?

Hello, everyone! The video shows how to change the Mozilla Quantum interface's language. This change is valid for Mozilla Quantum - release 60 and later. The default should be the preference intl.locale.requested. If there is no preference intl.locale.requested, you can create one. Do not worry - that's easy. Just watch the video carefully. For Firefox - release 59 and previous versions: If intl.locale.requested does not change the language, do the following: about:config, put in the address bar intl.locale.matchOS = false Put in the address bar - general.useragent.locale Put the language code in the window. Press OK/Enter-Restart Mozilla Firefox. If you have any questions, please put them in the comments. Thanks for your attention! command - about:config preference - intl.locale.requested Adding, changing and resetting preferences-link: https://support.mozilla.org/bg/kb/about-config-editor-firefox Dictionaries & Language Packs (links) - https://addons.mozilla.org/en-US/firefox/language-tools/ https://addons.mozilla.org/en-us/firefox/language-tools/general Music: https://www.youtube.com/audiolibrary/music?ar=2&nv=1 Artist: Diamond Ortiz Melody: Really Really Doe