There is no “Manage Extensions” in Opera.

[lccmec]

I have the latest Opera on my W7 Pro.

 

[helpstar]

Have a look at this site, extensions should be there: O Menu > Extensions
https://help.opera.com/en/latest/customization/

 

[lccmec]

Have a look at this site, extensions should be there: O Menu > Extensions
https://help.opera.com/en/latest/customization/

Have a look at this site, extensions should be there: O Menu > Extensions
https://help.opera.com/en/latest/customization/

Have a look at this site, extensions should be there: O Menu > Extensions
https://help.opera.com/en/latest/customization/

Thank you.

 

[helpstar]

You are welcome