Thanks to the scratch community for making this addon! I've been using it for like 3 months and I enjoy it! Scratch Addons install: FireFox https://addons.mozilla.org/de/firefox/addon/scratch-messaging-extension/ Chrome https://chromewebstore.google.com/detail/scratch-addons/fbeffbjdlemaoicjdapfpikkikjoneco I couldn't find anything for Opera but, you can use the Chrome extension and ignore the warning :)
