risk/benefit of 'startupCache' suggest eliminating it
My natural aversion to any file with a name containing "cache" has cause me to script the removal of 'startupCache.8.little' every time Tor Browser starts. So far I detect no loss of functionality, and the elimination of a potential vector for malware persistence causes me to feel slightly safer. Whatever miniscule improvement in start time that might result from this file pales in comparison to the potential risk it presents.
Perhaps it should be eliminated from standard TBB Firefox?
TBB 5.0.4
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information