Unusual behavior of Windows 8.1 crash and browser cache?

Question

Windows

I have been using Windows for many years, but only recently Windows 8.1.
I was extremely surprised by the following phenomenon. The program hung, I had to hurry, I turned off the power, left. Upon returning, when I turned on the computer again, I suddenly found that the sessions in both browsers were cleared. Those. Windows used to ask, "The computer was not properly shut down. What should I do? Restore the system? Try to start as is? Safe Mode?" Here silently, hike, restored. Ohh ..
Here you need a lyrical digression :
(And I was slowly moving from the old Opera 12 to the new FireFox, I was too lazy to transfer the last tabs. It so happened that there are 100+ open tabs in Opera, in FF 150+ and at one moment they are all cleared, O_O! Well, at first I I didn’t get upset, it happened, I got into the history of the opera, I just, I think, pierce all today’s sites, and everything is as it was ... Yeah - Now! The history is empty! This has never happened before! I got into system recovery, on good luck it turned out 7zip was installed right before the flight. I recovered from the point. FF restored the session as it was, the Opera is empty! Here I was very upset - it's a shame! I think it's probably because synchronization with Mozilla was turned on in FF, and in Opera - no. There were few problems, either emergency shutdown, or system restore also left 2 source files empty: 1st - from the project in MS VS to "my documents", another from "C:/temp/". Well, I sent them by mail, I was able to download them from there.
Yesterday, as luck would have it, full of work, and the task manager hung on the computer. Ohhh .. (well, maybe I'm crooked that this happens to me, but it happens ... not often ... different), gritting my heart, carefully turn off FF. Looks like it closed successfully. Reloading in an emergency. I pray. But no - the session is empty. FF - saves history somehow to a friend, I restore the system. And he thinks something for half an hour ... I'm all on my nerves, I understand that I didn't send the script from temp to anyone. Thank God the script is in place. God helped.
Conclusion: Synchronization does not help. Why is she needed? So that I have 150 tabs on my mobile phone? She can't handle 10, thanks. )
Question:
1. How to make Windows 8.1 ask before restoring the configuration?
2. What is the best way to secure the state of tabs, session in FF?
At the Opera, thanks - no need, because. Thanks to Windows 8.1, I successfully upgraded to FF ((
Thanks in advance for your answers, don't judge too harshly - my first question on Toster.

Answer 1

So far I've solved the problem using Firefox.
Session Manager
Awesome addon - even cooler than opera sessions: keeps tabs, windows and grouping as it was; makes a backup every few minutes; saves it separately, you can have several copies and if one of them falls, roll back to an older one.
FEBE
So far, thank God, I haven't had to use it. But this is a control addon: in case everything goes down, there will be a full backup of my entire browser account with all the add-ons and settings.
There is also
Session box - Tabs manager
ported from Chrome to Fox. Significantly worse, does not preserve the grouping, and everything interferes together.
But just in case, he left it.
But so for me there was a painful question: why does Windows 8.1 destroy the settings of user programs ???