I was f**d up by opera crash when all my opened tabs (100+) vanished. I want to use workspaces to manage my tabs in future. But it has to be saved as backup for such bad scenarios like crash/windows update. For usual work I found out that Last Session and Last Tabs files could be saved to restore in case of crash. It's also possible to save with extensions like Session Buddy. But how to save all workspaces and their tabs? Yes one can save to dial folder each of workspaces but anyway I want to save some backup file.
I also didn't find the way to open Last Session, Last Tabs files to see its content. They are binary.