Is there a way to get Profile Switcher working on Librewolf (on Linux), a hardened fork of Firefox?

[0x6A7232]

It looks like Librewolf is pretty much the same, but Profile Switcher thinks the 3rd party .deb still needs to be installed (I'm on MX Linux, which is based on Debian).
This should already be installed as I have Firefox installed already with Profile Switcher working just fine on it. Do I need to customize something in the Profile Switcher config to get it to point at Librewolf's profiles instead of the Firefox default?

If the .deb isn't already installed, I do seem to remember something Firefox did with an update that broke Profile Switcher and I had to manually enter the location of the Firefox binary in a config file somewhere but I don't recall exactly where that config file was. Is this possibly the issue?

EDIT: in /home/$USER/.librewolf I have installs.ini and profiles.ini, and two folders that match the paths mentioned within. The file contents are:

installs.ini

[6C4726F70D182CF7]
Default=piy8uv0j.default-default
Locked=1

profiles.ini

[Profile1]
Name=default
IsRelative=1
Path=br510ajh.default
Default=1

[Install6C4726F70D182CF7]
Default=piy8uv0j.default-default
Locked=1

[Profile0]
Name=default-default
IsRelative=1
Path=piy8uv0j.default-default

[General]
StartWithLastProfile=1
Version=2

In /home/$USER/.mozilla/firefox there are several different folders, and the installs.ini and profiles.ini are as follows:

profiles.ini

[General]
StartWithLastProfile=1
Version=2

[Install6AFDA46A1A8AD48]
Default=ja40rzkn.default-release
Locked=0

[Profile0]
Name=default
IsRelative=1
Path=f5xuoz65.default

[Profile1]
Name=default-release
IsRelative=1
Path=ja40rzkn.default-release
Default=1

[Profile2]
Name=Yahoo
IsRelative=1
Path=profile-01G4WMDW0EQ3FM20H09KPZ8TNF

installs.ini

[6AFDA46A1A8AD48]
Default=ja40rzkn.default-release
Locked=0

[0x6A7232]

Might be an answer in this issue