User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.3) Gecko/20040910 Build Identifier: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.3) Gecko/20040910 When you install a new release under windows 98, the files from the old release are not deleted in this directory : C:\Program Files\Fichiers communs\mozilla.org\GRE\. So after an update 1.7.3 I can find these directories : 1.7.2_2004080302 and 1.7.3_2004091008. Reproducible: Always Steps to Reproduce: you just have to upgrade from a previous release under windows 98SE.
If I deinstall prior to installation, the GRE is deinstalled. If I install ontop, into the old mozilla directory without deinstalling first, the old GRE stays. Did you install on-top? See Bug 230378 Nightly builds not cleaning up older GRE files Bug 198081 Old GRE's left on disk when upgrading Mozilla
Yes it's an installation on-top. It's not a deinstallation -> installation.
(In reply to comment #2) > Yes it's an installation on-top. It's not a deinstallation -> installation. Then it is a dupe of Bug 198081 Old GRE's left on disk when upgrading Mozilla. *** This bug has been marked as a duplicate of 198081 ***