where do temp files go then?

[Techontop]

(Sorry if wrong place for this. Didn't find any other.)
Using "Install Chrome Extensions", where do temp files and default locations go then? E.g. in Chrome, SessionBuddy saves to C:\Users[name]\AppData\Local\Google\Chrome\User Data\Default\databases\chrome-extension_edacconmaakjimmfgnblocblbcdcpbko_0. I know the SessionBuddy I installed in Opera doesn't save to the same place because it has it's own set of data of saved sessions. But there is no equivalent location under ...\local\opera software. So where is it going? This info could be added to the info screens about "Install Chrome Extensions" so this info could be found.