These files are usually stored in AppData\Roaming\Opera Software\Opera GX Stable .
If you are trying to use a legitimate tool to your own data, the write-up would focus on: quickcookie-OperaGX.txt
Using Developer Tools (Ctrl+Shift+I) in Opera GX to view and copy cookie values. quickcookie-OperaGX.txt
If you found this file on your system or in a sandbox report, it is often a sign of a . These scripts target Opera GX specifically because of its popularity with gamers. A write-up in this context would cover: quickcookie-OperaGX.txt