Opera Software ASA

How to create an extension

1. Create a config.xml file

   This file describes the extension and includes data such as name and description.

2. Add JavaScript and HTML files

   An extension file structure could look like this:

   • /config.xml (mandatory)
   • /index.html (contains JavaScript that can, for example, add a button to the browser toolbar)
   • /includes/userJS.js (JavaScript that gets injected on webpages the user visits)
   • /icons/button-icon.png
   • /icons/64x64-icon.png

3. Zip up the files and rename the ZIP file to contain an .oex file suffix

   You should end up with something like: myExtension.oex. Do not include the parent directory when archiving the files.