Another thing which might be handy to know:

On a different laptop I recovered an old wallet with zero balance from which I still had the 12 word phrase. After that I checked the location "com.liberty.jaxx" to see which files had been changed/updated recently.

I initialized the wallet restoration via the seed phrase at 2:40 AM and of all the files in the location "com.liberty.jaxx" only "blob_storage" (at 2:40 AM) and "Cookies" and "Cookies journal" (both at 2:44 AM), and "log", "preferences" and "quotamanager-journal" (all thee at 2:40 AM) were recently changed. So it appears only these files can possibly contain the private keys, or am I missing something?
How else could a wallet restore and update the correct balance without accessing the private keys?

Locations such as "IndexedDB", "databases", "cache", "GPUcache" and "local storage" have not been changed since hours ago so how can they contain vital info for a wallet?