I've updated the version, but in some applications, it tells me I have an obsolete version

I've updated, even uninstalled and reinstalled.
YouTube, Outlook does not work properly, as they say I have an old version
When I check the version on the help function in Firefox, it tells me that it is up-to-date

I also noticed that you have a User.js file.

Did you create this file?

Delete this file can help solve your problem.

If you have not created this file, manually remove the Firefox program directory or the Firefox application data.

The report please come back shortly.

WARNING: Removal of the files/folders could damage other programs and the Windows operating system. Be careful when you manually delete the folders/files.

Tags: Firefox

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