@dc3609 it can't be disabled without modifying opera source code, but you can re-enable extension and keep it on until next reboot (idk, maybe longer), just replace "blacklist":true to "blacklist":false and "blacklist_state":1 to "blacklist_state":0 in Preferences, Secure Preferences and their .backup versions
if you on linux, you can use this shell script to do it automatically (run it before opera start or put it on autorun)

cd ~/.config/opera/Default for file in Preferences Preferences.backup Secure\ Preferences Secure\ Preferences.backup; do sed -i s/\"blacklist\":true/\"blacklist\":false/g "$file" sed -i s/\"blacklist_state\":1/\"blacklist_state\":0/g "$file" done

and all this problems bcs some idiots put tampermonkey in their ad virus 🤦♂