If you are using an extension then you need to bring up the issue with the maker of the extension. Opera is not responsible for what the maker of an extension does or does not do.
On a related note, you can install Chrome extensions in Opera. It is not official supported and not all bookmarks work but it is possible. Go to the Opera store and install the 'Download Chrome Extension'. Once installed, go to the Chrome store page for the extension you wish to install and install it.