Hi
Please try to use the below config for Firefox. There seems to be no issue with AppVol UIA. I was also facing issues in capturing personalization for Firefox and finally resolved it.
[IncludeRegistryTrees]
HKCU\Software\Mozilla
HKCU\Software\mozilla.org
HKCU\Software\MozillaPlugins
[IncludeFolderTrees]
<AppData>\Mozilla\Firefox
[ExcludeFolderTrees]
<AppData>\Mozilla\Firefox\Crash Reports
<AppData>\Mozilla\Firefox\Profiles\[MATCHALL]\crashes
<AppData>\Mozilla\Firefox\Profiles\[MATCHALL]\storage
Regards
Hussain