Opera 18 stable is now available for download.What’s new in this release?
Chromium version 31.
Allow websites to access your camera and/or microphone, including support for HTML5 media access.
Themes from addons.opera.com can be installed through the theme manager.
Navigate back and forward between pages in a tab’s history by rocking your fingers across your mouse buttons.
You can now drag tabs between open windows.
Enhanced support for Chromium extensions.
Custom search engines can be created from form context menu (right-click, or Ctrl-click on Mac, in any webpage’s search form to try).
In Windows, set the browser language from the Settings page.