Use this extension if you want to use Smartschool on Opera browsers. It fixes some bugs and adds some functionality to Smartschool (like storing your username).
Note: I've recently got graduated and have no access to my Smartschool account anymore. This means I can't test the extension anymore, so I can't promise that everything still works and I certainly can't add more functionalities.
Werkt goed, enkel schoonheidsfoutje in de rechterbenedenhoek. maar dat is een detail. :)