Problem sharing Firefox profile between different partitions

[joneall]

I have several Neon systems on different partitions sharing a common profile in my my-files partition, mounted by all. It has worked ok up until 24.04.

Firefox configs are in ~/,mozilla/firefox, so I make a symlink of the common profile

$ ll
total 28
drwx------ 2 jon jon 4096 oct. 20 15:29 1b4xzi02.default
drwx------ 4 jon jon 4096 oct. 14 10:11 'Crash Reports'
-rw-rw-r-- 1 jon jon 62 janv. 28 2023 installs.ini
drwx------ 2 jon jon 4096 juin 7 2023 'Pending Pings'
-rw-rw-r-- 1 jon jon 259 janv. 28 2023 profiles.ini
lrwxrwxrwx 1 jon jon 69 oct. 20 14:56 qz7igjko.default-release -> /home/jon/jon-files/jon-mozilla/firefox.sda5/qz7igjko.default-release
drwx------ 20 jon jon 4096 oct. 20 14:54 qz7igjko.default-release.sav

$ cat profiles.ini
[Install4F96D1932A9F858E]
Default=qz7igjko.default-release
Locked=1

[Profile1]
Name=default
IsRelative=1
Path=1b4xzi02.default
Default=1

[Profile0]
Name=default-release
IsRelative=1
Path=qz7igjko.default-release

[General]
StartWithLastProfile=1
Version=2

It works like a charm on a pre-24.04 system I have kept around (fortunately!), so the "LOCKED-1" doesn't seem to be importantl. I try to do the same thing in 24.04 and I continually get a message saying Firefox is already running. A similar method exists in various places on the Internet. I have deleted lock and .parentlock in the profile, but that has no effect except to put them back.

What to do?

[claydoh]

I think that the profile for FF as a snap is in a different location.

Entering

about:profiles

the URL bar should show the location.

[joneall]

Mine is not installed with snap, apt did the job. I already checked

about:profiles

and they are indeed in ~/.mozilla/firefox. Thanks anyway.

[joneall]

Btw, I use a similar technique with Thunderbird, modifying profile.ini to point to a driectory on my shared partition. That works just fine. Only Firefox is recalcitrant.