FireFox portable still writes data in %ProgramData%\Mozilla

Firefox writes to multiple directories while running but it should be removed on exit. What specifically is left behind? This often changes in newer Firefox versions and I have to keep updating the launcher to keep pace.

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Windows 10 Pro 21H2
Firefox Portable 95.0.0

• FirefoxPortable.exe runs from D:\PORTABLES\FirefoxPortable\
• The Firefox.ini is used but the only edit is AllowMultipleInstances=true
• policies.json in distribution folders in both app folders to DisableTelemetry and DisableAppUpdate
• about:preferences > General > Startup: "Firefox is not your default browser"

Mozilla folders are created in:
C:\ProgramData
C:\Users\user\AppData\Local
C:\Users\user\AppData\LocalLow
C:\Users\user\AppData\Roaming

The ProgramData\Mozilla folder contains:
profile_count_FirefoxPortable.json
UpdateLock-FE5AA575DA108BEA
An "updates\FirefoxPortable" folder containing update-config.json

In AppData, files and folders like
SkeletonUILock-540da419
Temp-{e95ad136-1ee9-4134-80c6-6a6dbbecfb39}
are cleared on closing but not in
Roaming\Mozilla\Firefox\Crash Reports

I delete 'em all them and they return.

Not particularly an issue with me. Just posting up my observations. But a solution, if any, to squelch all that folder/data building would be welcome.

Additional detail upon request at your convenience, like after your New Year celebrations.

BTW: Thanks for PortableApps!

Cheers.