Hi,
There is a list on the Bleachbit(open source cleaner app) for Firefox about what to clean:
Adblock Backups
Bookmark Backups
Crash Reports
Dump Files
Firefox Corrupt SQLites
Firefox Extensions Log
Firefox Logs
Firefox Minidumps
Firefox Startup Cache
Firefox Telemetry
Firefox TestPilot Error Logs
Firefox Update Logs
Firefox urlclassifier3.sqlite
Firefox webappsstore.sqlite
FlashGot
Lock Files
Maintenance Service Logs
Recovered File Fragments
Session Manager deleted sessions
Shortcut Cache
Stylish Sync Backups
Sync Logs
Thumbnails
Is there any way (trick) to clean these for Firefox Portable?
Thank you