Hey, what do you want, you have now awesome animations! sigh ...
I just woke up and my system too. Opera was sluggish and even bogged down the mouse movement, when minimizing it was ok. So I closed it.
After restarting Opera all tabs where gone. Not that much, maybe 50? I thought CTRL Shift T will bring them back, but I get a crash window, sometimes Opera just restarts.
All extensions got disabled, also great.
I found a page describing how to get them back from the Sessions file, the problem is that there is none before the crash. I looked at the session and tab files and extracted the URLs out of them and found only a handful of old tabs. Great backup, glad I have multiple files with basically nothing I need. Always good to have! I searched all binary files for my tabs, but nothing.
I had no crash reports enabled as it looks like, so nothing to provide.
To be fair: at least the session information seems to be intact, there was no need to login into the services after the restart.
Now the only reason why I use Opera is gone. If the workplaces are not working reliable I can also go back to use chrome. Sure, I will have a cluttered tabbar but at least my tabs will not vanish.
I'm really pissed.