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Tutorial : How to change the default language of Mozilla Firefox browser

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#1 BoSS


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Posted 31 May 2015 - 08:38 AM

This is a tutorial for the people need to change the language of the Mozilla Firefox, many people was asking so i created this for you.


If you need to switch between different interface languages,

  1. Install the language pack for the desired languages.
  2. Type about:config into the address bar and press Enter.
  3. To bypass the warning, press the big button labeled "I'll be careful, I promise!".
  4. In the search box, paste intl.locale.matchOS
  5. In the search results, if intl.locale.matchOS is set to true, double-click it to set its value to false.
  6. In the search box, paste general.useragent.locale
  7. In the search results, double-click general.useragent.locale and set its value to the desired language.
  8. Restart Firefox for the change to take effect.

If you need to switch languages frequently, you may want to get an add-on like Simple Locale Switcher.

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#2 jiuer7845



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Posted 05 May 2021 - 03:04 AM


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