https://connect.mozilla.org/t5/discussions/breaking-changes-from-org-mozilla-thunderbird-to-org-mozilla/m-p/126689#M50896 <P>It would have been highly beneficial to provide a function or procedure to migrate all files (if they existed) from <STRONG>org.mozilla.Thunderbird</STRONG> to <STRONG>org.mozilla.thunderbird</STRONG>. In the absence of such a mechanism, the update effectively behaves like a fresh installation, creating the impression that all user settings and data have been lost.</P><P>I resolved the issue by manually copying all files from <STRONG>/home/USER_NAME/.var/app/org.mozilla.Thunderbird/</STRONG> to <STRONG>/home/USER_NAME/.var/app/org.mozilla.thunderbird/ </STRONG>and restarting Thunderbird, after which everything functioned as expected. This could also have been addressed through a symbolic link to the new path.</P><P>I believe more care should be taken when implementing breaking changes of this nature, as many end-users would not know how to resolve this issue on their own. Clear guidance or automated migration would help prevent unnecessary disruption and confusion.</P> Wed, 27 May 2026 20:04:26 GMT HDEEEE 2026-05-27T20:04:26Z https://connect.mozilla.org/t5/discussions/breaking-changes-from-org-mozilla-thunderbird-to-org-mozilla/m-p/126689#M50896 <P>It would have been highly beneficial to provide a function or procedure to migrate all files (if they existed) from <STRONG>org.mozilla.Thunderbird</STRONG> to <STRONG>org.mozilla.thunderbird</STRONG>. In the absence of such a mechanism, the update effectively behaves like a fresh installation, creating the impression that all user settings and data have been lost.</P><P>I resolved the issue by manually copying all files from <STRONG>/home/USER_NAME/.var/app/org.mozilla.Thunderbird/</STRONG> to <STRONG>/home/USER_NAME/.var/app/org.mozilla.thunderbird/ </STRONG>and restarting Thunderbird, after which everything functioned as expected. This could also have been addressed through a symbolic link to the new path.</P><P>I believe more care should be taken when implementing breaking changes of this nature, as many end-users would not know how to resolve this issue on their own. Clear guidance or automated migration would help prevent unnecessary disruption and confusion.</P> Wed, 27 May 2026 20:04:26 GMT https://connect.mozilla.org/t5/discussions/breaking-changes-from-org-mozilla-thunderbird-to-org-mozilla/m-p/126689#M50896 HDEEEE 2026-05-27T20:04:26Z