One of the few reasons why most users hesitate to leave Chrome is due to its extensive support for third-party apps and extensions. Thankfully, though, Opera is based on the same architecture Google Chrome runs on. So you can install extensions from Chrome's web store directly on Opera.
Click Here to download and install the Chrome extension for Opera. Once that is done, open the page of the Chrome extension you'd like to install and click the 'Add to Opera' button. You'll then be redirected to the extensions page where you'll need to tap the Install button, accept the warnings and you're good to go.