Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

"XULRunner This profile was last used with a newer version of this application. Please create a new profile."

lasogna
lasogna

I am getting the popup after I downloaded 115.7 ESR and transferred a profile that was also on the same version. In compatability.ini it says LastVersion=115.7.0.

I am getting the popup after I downloaded 115.7 ESR and transferred a profile that was also on the same version. In compatability.ini it says LastVersion=115.7.0.

Chosen solution

Was the other profile also running in 64-bit Firefox 115.7.0esr in the same language? If there were any differences in the build, you could get that message.

If you are confident that it wasn't a later version, you can start Firefox with the "allow downgrade" option described toward the end of the following article: Dedicated profiles per Firefox installation.

Read this answer in context 👍 1

All Replies (1)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer

Chosen Solution

Was the other profile also running in 64-bit Firefox 115.7.0esr in the same language? If there were any differences in the build, you could get that message.

If you are confident that it wasn't a later version, you can start Firefox with the "allow downgrade" option described toward the end of the following article: Dedicated profiles per Firefox installation.