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XULRunner Error "91.2.0 not compatible with min > = 91.0, max < = 91.0

  • 3 replies
  • 1 has this problem
  • 4696 views
  • Last reply by cor-el

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Firefox updated. After updating, whenever I try and load Firefox, I receive the following error message:

"XULRunner

"Error: Platform version '91.0.2' is not compatible with "minVersion > = 91.0 "maxVersion < = 91.0"

I click, "OK" to confirm... and Firefox closes. When I try to update Firefox once more, I receive no response from teh System. When I try to load MaintanceService, I receive no response. What's teh deal here. Any answers?

Firefox updated. After updating, whenever I try and load Firefox, I receive the following error message: "XULRunner "Error: Platform version '91.0.2' is not compatible with "minVersion > = 91.0 "maxVersion < = 91.0" I click, "OK" to confirm... and Firefox closes. When I try to update Firefox once more, I receive no response from teh System. When I try to load MaintanceService, I receive no response. What's teh deal here. Any answers?
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Chosen solution

You can download the full version via the link I posted above.

The profile folder that stores your personal data is stored elsewhere, so you won't lose bookmarks and extensions.

Read this answer in context 👍 1

All Replies (3)

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An error message about XPCOM missing or about platform version usually happens because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists.

You can find the full version of the current Firefox release (91.0.2) in all languages and all operating systems here:

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So, I interrupted the updating process. Is there a download link just for the update to 91.0.2, so I don't have to re-install my extensions?

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Chosen Solution

You can download the full version via the link I posted above.

The profile folder that stores your personal data is stored elsewhere, so you won't lose bookmarks and extensions.