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.

Search Support

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

I can't update to version 28.0. The update is not applied.

  • 2 பதிலளிப்புகள்
  • 2 இந்த பிரச்னைகள் உள்ளது
  • 4 views
  • Last reply by cor-el

Firefox is trying apply the partial version of 28.0 - and says it doesn't work. I tried to install the full update, but get the same result.

The same happens with the manually downloaded version. What to do?

Regards / Bengt

Firefox is trying apply the partial version of 28.0 - and says it doesn't work. I tried to install the full update, but get the same result. The same happens with the manually downloaded version. What to do? Regards / Bengt

All Replies (2)

Hello BengtC, in your profile folder you have a User.js file.

The user.js file does not exist by default. If you create the file, forget it, if you have not create the file then delete the User.js file, and try to update firefox again (some programs create and write in the User.js file also).

thank you

Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.

Download a fresh Firefox copy and save the file to the desktop.

If possible uninstall your current Firefox version to cleanup the Windows registry and settings in security software.

  • Do NOT remove personal data when you uninstall your current Firefox version, because all profile folders will be removed and you lose personal data like bookmarks and passwords from profiles of other Firefox versions.

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (32 bit Windows) "C:\Program Files\Mozilla Firefox\"
  • (64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"

Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.