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

what does XUL runner 1.9.1.12 is incompatible mean?

  • 1 odgovor
  • 3 ima ovaj problem
  • 2 views
  • Posljednji odgovor poslao cor-el

more options

computer asked to restart to load an update. when this was done, firefos refused to launch and this error came up. XUL runner 1.9.1.12 is incompatible with min version 1.9.2.12 max version 1.9.2.12

computer asked to restart to load an update. when this was done, firefos refused to launch and this error came up. XUL runner 1.9.1.12 is incompatible with min version 1.9.2.12 max version 1.9.2.12

All Replies (1)

more options

You usually get this error if files were in use and the updater wasn't able to update all files.

In such a case it is best to delete the Firefox program directory manually to remove all files and install a fresh copy that you ave downloaded before deleting that folder.


Do a clean (re)install:

  • Download a fresh Firefox copy and save the file to the desktop.
  • http://www.mozilla.com/firefox/all.html
  • Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
  • Don't remove personal data if you uninstall the current version.
  • It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.

Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.