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XULRunner keeps saying "error: platform version 20.0.1 is not compatible with >min version=19<max version=19 "how do i fix this?

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  • Last reply by cor-el

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Windows XP SP3. Worked this morning! Now I get this error XULRunner keeps saying "error: platform version 20.0.1 is not compatible with >min version=19.0 <max version=19.0" how do i fix this? </p>

Windows XP SP3. Worked this morning! Now I get this error XULRunner keeps saying "error: platform version 20.0.1 is not compatible with >min version=19.0 <max version=19.0" how do i fix this?

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This is caused by a broken (corrupted) Firefox installation where not all files have been updated properly.

Do a clean reinstall and delete the Firefox program folder before reinstalling a fresh copy of Firefox.

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

Uninstall your current Firefox version, if possible, 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 will also lose your 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.

Your bookmarks and other profile 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.

If you keep having problems then also create a new profile.