BUG: All Tabs were gone
Yesterday, I've started my Computer.
It was the third day of using Vivaldi. I've started and closed the browser minimum 50 times for testing (trying some Chrome Webstore addons).
Windows7 64bit Firewall has come forward and asked me to allow Vivaldi network activitation. It's a single Computer, no network. I've agreed that.
After that I've started Vivaldi.
The tabs from the session before were gone.
I missed the feature "save last session automatically" after closing Vivaldi browser.