Well, anyway this Browser is full of Bugs from the reports I'm seeing in this Forum, I gave this Browser a chance but honestly, if it gives me so much, if these are the conditions, I prefer to use another Browser, I don't want it anymore to relogin all my accounts every week..
is not worth the trouble/the effort/the cost..

You try installing Chrome and seeing if the problem persists?

So..
7 days have passed...
and at exactly 00:33 (Today) Opera Browser closed spontaneously and disconnecting all my accounts again.

And this is more than a "Simple Random Bug" this is a Scheme!
Because every 7 days at 00:33 the browser closes and the accounts disconnect, this is programming, therefore, the hypotheses (at this point), are these:

• An Opera setting that was activated with the latest update of which the user is not aware and therefore is identified as a Bug/Virus and instead is not..

• A programming error that interferes with the functioning of Opera.

I have no other explanation than these that can justify this behavior..

And between 00:32 and 00:33 these folders were changed

And these Files

And by the way, I didn't say "Notepad" I said "Notepad++" (They are 2 different applications).

I realized the problem when I changed profile,
Basically I renamed the "Opera Stable" folder to "Opera Stable_old" both in the directory:
"C:\Users\MyUser\AppData\Local\Opera Software\Opera Stable"
which in the directory:
"C:\Users\MyUser\AppData\Roaming\Opera Software\Opera Stable".

Once this was done, Opera RESET itself to its original settings by creating a new "Guest User ID" and AVG no longer warned me of Viruses when I opened Opera, (unlike what it did before).

So, the antivirus gave me "The Name of the Enemy" to "Focus" on, i.e.:(gogglerespite.com),
Resetting Opera, I realized that the problem was that my Profile Name or ID had been compromised by a Virus,
Using "Notepad++" as a search "TOOL", to do a targeted search, I found where the Virus was "lurked"!
And I'm pretty sure the problem specifically was FILES
"Preferences and Preferences.backup" and "data_1"

"data_1" can be found in:
C:\Users\MyUser\AppData\Local\Opera Software\Opera Stable\Cache\Cache_Data
While "Preferences and Preferences.backup" can be found in:
C:\Users\MyUser\AppData\Roaming\Opera Software\Opera Stable

Then inside there were commands with curly braces (I don't remember exactly, I deleted them) with then the wording (gogglerespite.com).

Which essentially forced Opera to access that site on startup.
Plus, (which I hadn't told before).
Ever since Opera first started shutting down and logging out of all my accounts (which happened about 1x a week), Opera had gotten awfully SLOW!
and it was also struggling to synchronize my data, not even the profile picture appeared!
as soon as I did what I explained above, it unlocked, became fast, and is giving me no more problems!
if I'm wrong, in about a week (as it did until yesterday), it should close and log me out of all accounts, but if it doesn't, it means that I'm right and I've solved the problem, I'll let you know in a week!

I opened Notepad++
I did CTRL+F, I went to the "Search in Files" TAB
indicating as targets:
"C:\Users\MyUser\AppData\Local\Opera Software\Opera Stable"
and
"C:\Users\MyUser\AppData\Roaming\Opera Software\Opera Stable"
and I told it to search all the Files with the word "gogglerespite.com".

Once it found me all files containing "gogglerespite.com"
renamed them all to "FileName.old" or (like with the "Preferences and Preferences.backup" File) opened them and searched for the word "gogglerespite.com", deleted all entries for "gogglerespite.com", I saved them , I opened Opera, no problem and everything works fine!

If you temporarily rename your profile, does it still happen?

gogglerespite.com redirects to google.com, which does seem suspicious. But, I can't see what's in gogglerespite.com/sbar.json without a valid, unexpired key.

I tried to open the other Browsers (Google Chrome and Microsoft Edge) and the antivirus doesn't tell me anything!
it only does it with Opera!

I uninstalled and reinstalled Opera, as soon as the browser started for the first time, this appeared!

and this:

I just did a deep scan and I found this:

Is it the same like yours?

I have no idea why these viruses were constantly shutting down Chrome-based browsers but they're definitely the culprit. If you're reading this message from the future experiencing the same problem now you know--don't just rely on antivirus tools that come with Windows and try running a third party program!

=======================================

=======================================

P.S.

What bullshit..

Using Opera GX too or regular Opera?

What version and system is everyone one using? Goto the URL opera://about to find out.

You can also always test in a standalone instlallation to see how things work there to rule out issues with Opera's install files, your profile in general, extensions, and Opera Sync etc.

You also might not have the Angle flag set to the best option for your GPU, which could cause instability in some cases.

It could just be a bug in Opera though. You can test in standalone installations of Opera Beta and Opera Developer to see if it's something that's already fixed that will eventually reach Opera Stable (and then Opera GX).