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Firefox 159.0.1 (Mozilla .deb) now uses ~/.mozilla instead of ~/.config/mozilla – only me?

Firefox Profiles
mrpg
mrpg

I am using Firefox (.deb from mozilla, not snap) in ubuntu budgie 26.04. It used ~/.config/mozilla/firefox as its profile root but after I updated to 159.0.1~build1 and clicked on a link in Thunderbird it began to use ~/.mozilla. I closed firefox, renamed that .mozilla directory, and it recreated it. MOZ_LEGACY_HOME is not set, and XDG_CONFIG_HOME is unset.

Is it only me? Thanks for your time.

$ aptitude show firefox Paquete: firefox Versión: 159.0.1~build1 Desarrollador: Mozilla <release@mozilla.com>

$ aptitude show thunderbird Paquete: thunderbird Versión: 2:1snap1-0ubuntu5

~$ stat .mozilla/ 

File: .mozilla/
Birth: 2026-11-04 14:43:08.656418113 -0300

~$ stat .config/mozilla 

File: .config/mozilla
Birth: 2026-05-01 00:15:51.579973605 -0400

about:support: Firefox 159.0.1 (build 20261102144711), distributionID mozilla-deb, Linux 7.0.0-42-generic, Wayland (MOZ_ENABLE_WAYLAND=1). The crash reporter’s data and ping directories point to ~/.mozilla/firefox, even though the profile is in ~/.config/mozilla/firefox.

I am using Firefox (.deb from mozilla, not snap) in ubuntu budgie 26.04. It used ~/.config/mozilla/firefox as its profile root but after I updated to 159.0.1~build1 and clicked on a link in Thunderbird it began to use ~/.mozilla. I closed firefox, renamed that .mozilla directory, and it recreated it. MOZ_LEGACY_HOME is not set, and XDG_CONFIG_HOME is unset. Is it only me? Thanks for your time. $ aptitude show firefox Paquete: firefox Versión: 159.0.1~build1 Desarrollador: Mozilla <release@mozilla.com> $ aptitude show thunderbird Paquete: thunderbird Versión: 2:1snap1-0ubuntu5 ~$ stat .mozilla/ File: .mozilla/ Birth: 2026-11-04 14:43:08.656418113 -0300 ~$ stat .config/mozilla File: .config/mozilla Birth: 2026-05-01 00:15:51.579973605 -0400 about:support: Firefox 159.0.1 (build 20261102144711), distributionID mozilla-deb, Linux 7.0.0-42-generic, Wayland (MOZ_ENABLE_WAYLAND=1). The crash reporter’s data and ping directories point to ~/.mozilla/firefox, even though the profile is in ~/.config/mozilla/firefox.

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