Are LSOs from different Firefox profiles stored separately? or are they stored in one central location?
Are LSOs from firefox portable stored separately?
LSOs are stored in a central location, regardless of profile or browser used. Attention: This applies to most browsers with the exception of Chrome, if the integrated Flash player is used.
Mac OS X
Mac OS X
If you want Chrome to also use the same storage location, you can download the latest version from Adobe's site and enable/disable the appropriate plugin from the options in Chrome. More information on that subject can be found at Adobe.
On my Linux Fedora 23.0 system, the LSOs are stored in the directory ~/.macromedia/Flash_Player/#SharedObjects/VG6D94TT and there is a copy in ~/.macromedia/Flash_Player/macromedia.com/support/flashplayer/sys
I had to delete both copies manually, since the BetterPrivacy Firefox plugin can't find them at all, even when pointed at the directory in which they reside.