Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ابحث في الدعم

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How to safely remove version of firefox that uses the system default locale?

  • 3 ردود
  • 1 has this problem
  • 1 view
  • آخر ردّ كتبه cor-el

more options

I have Firefox with Greek locale due to my location.

I want to use Firefox in English, so I downloaded the English version and installed (in another HDD). I've already set it as a default browser, and thus, clicking at the firefox quick launch icon opens the english locale version.

Now I would like to clean my system, simply removing the greek locale version (located at C HDD) but without losing any data/extensions/etc.

How can I do that?


Thank you for your time.

I have Firefox with Greek locale due to my location. I want to use Firefox in English, so I downloaded the English version and installed (in another HDD). I've already set it as a default browser, and thus, clicking at the firefox quick launch icon opens the english locale version. Now I would like to clean my system, simply removing the greek locale version (located at C HDD) but without losing any data/extensions/etc. How can I do that? Thank you for your time.

All Replies (3)

more options

I am not 100% sure, but when running the Firefox uninstaller there may be an option to keep all application data.
You can give it a try, but first create a backup of the Firefox application data folder.

After you uninstall it, you can then install the English version of Firefox again.


WARNING: Removing folders/files can cause damage to other programs and the Windows operating system. use caution when manually deleting folders/files. Creating a backup of any deleted files is highly recommended! The above steps may result in loss of data.

more options

To choose your preferred language for the reinstall, use this page: https://www.mozilla.org/en-US/firefox/all/

more options

Installing the English (en-US or en-GB) version over the top of the Greek version would have been easier as that would have been replaced the Greek language pack (located in the omni.ja archive).

You can check the general.useragent.locale pref on the about:config page to make sure that it is set to the correct en-US (or en-GB) locale


If you have the Greek version listed in Control Panel > Programs then you can uninstall this version here.
Make sure that you aren't removing your personal data when uninstalling as this will remove all Firefox profile folders.