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Extend Opera

October 21, 2010

Developers now able to author, upload and share extensions for Opera 11

Oslo, Norway - October 21, 2010

Opera today released the first alpha of Opera 11, the next version of the company's award-winning desktop web browser. Opera 11 is the first Opera browser to include extensions, browser add-ons made using Opera application programming interfaces (APIs) and web standards like HTML5 and JavaScript. Opera was already the most powerful browser out-of-the-box; now, it adds a new level of customization. Opera 11 alpha is available from

Extensions allow users to make their web browser their own by adding features and functionality directly into the browser itself, rather than as standalone Opera Widgets or Opera Unite applications. Developers can build extensions with the same web standards they already use to build websites and web applications. Better yet, with only a few tweaks to their code, developers who have already authored a similar extension for other browsers will be able to share their creation with more than 50 million Opera desktop users.

"Opera has always been customizable, but now you can personalize your browser in a new way through Opera extensions," said Jon von Tetzchner, Co-founder, Opera. "We take pride in introducing new features to the browser. Now, other developers can join in the fun and share their innovations with millions of people. Everyone using Opera 11 will be able to personalize their browser in myriad ways, which opens up so many possibilities for making the Web a more personal experience."

Make an extension in three steps:

  1. Visit for complete tutorials and a guide to getting started.
  2. Code your extension using common web standards, such as HTML5, JavaScript and CSS.
  3. Upload to

Opera checks all extensions before they are made public to ensure the catalog of extensions is free from defects and malicious software.

More tools for developers

Opera today also launched an open developer API for the Opera Link browser synchronization service. Using this API developers can integrate Opera Link data with other services online and build applications with libraries made available for Java and Python:


Opera 11 alpha is available from for Windows, Mac and Linux computers.

Press kit

Opera 11 alpha presskit is available for download here.

About Opera

Opera enables more than 350 million internet consumers worldwide to connect with the content and services that matter most to them. Opera also helps publishers monetize their content through advertising and advertisers reach the audiences that build value for their businesses, capitalizing on a global consumer audience reach that exceeds 1 billion.

Opera is a trademark of Opera Software AS.