We will create this form of extension today. Button + Popup: A button in Opera's toolbar, which, when clicked, displays a popup window with a third party URL.Opera toolbar button: A basic extension that adds a button to Opera's toolbar.You can create numerous different types of Opera extensions: Here is a quick example of the mini Wikipedia extension: Opera has also released a supporting API to help developers build Opera extensions much more easily. With only a few tweaks to their code, developers who have already authored a similar extension for other browsers will be able to create an Opera extension easily. Opera extensions are based on the W3C widget specification.ĭevelopers can build Opera extensions with the same web stack skills they already possess (HTML, JavaScript, and CSS) to build websites and web applications. In this tutorial, you will learn the basics of developing Opera components by creating a simple extension with the same web standards we already use to build websites. Extensions allow users to make the web browser their own by adding features and functionality directly into the browser itself, and not as a standalone Opera Widget or Opera Unite application. Opera 11, the next version of the critically acclaimed web browser, packs an interesting, much wanted feature: extensions.

Howv to share opera extensions