Deal with UUID for content sandbox temp folder on Windows and Mac
Very important side issue is that the sandboxing feature adds `security.sandbox.content.tempDirSuffix` pref which is a 128-bit GUID that allows to uniquely identify your copy of Tor Browser. It is persistent and leaves unique traces on every machine you use in system %TEMP% folder.
We should find a good way dealing with that. Maybe a first start is to set the pref, so that every Windows user has the same sandbox temp dir name.