@lillollo What version of Opera?

Im not sure cause i cant open launcher.exe to check the version without it loading the corrupted session and crash, but i guess its Opera Portable 95 judged on the folders here

you also see some Json files from extensions that handled them

https://forums.opera.com/topic/67907/opera-portable-transfer-old-profile-troubles/2https://forums.opera.com/topic/67907/opera-portable-transfer-old-profile-troubles/2

"Opera 95 is the last major version that supports Windows 7, 8 and 8.1. The last 95 build of regular Opera is at https://ftp.opera.com/pub/opera/desktop/95.0.4635.90/win/. They are offline installers that contain all the install files (as opposed to a 2MB net installer that fetches the install files)."

@lillollo said:

did i really dare to store my 900 open pages in my sessions

You can try to solve that problem first. Anyway, there should be some session manager extensions that you can used, including the ones in Chrome Store.

I just remember now how it was possible to use Session Managers and handle J.son files,
i used Opera Portable for Windows 7 (64 bit) that could handle Chrome extensions, to bad my portable folder is corrupted right now and the installer.exe is trashed

Actually it wasn't 900 pages, i was just manage to check it out it was just 172 pages on
this workspace and 62 on the second worskapce, but its weight was 900 kg
https://forums.opera.com/topic/70739/session-urls-blocked-and-replaced-by-opera

Opera extension search page gives zero results?
Can you install an extension in opera without using "https://addons.opera.com/sv/extensions/?ref=menu"

did i really dare to store my 900 open pages in my sessions

You can try to solve that problem first. Anyway, there should be some session manager extensions that you can used, including the ones in Chrome Store.