Last update: 2013-11-19
The information below describes version history for Opera browsers built using the WebKit/Chromium rendering engine, Opera versions 15.0 and above. For information about the landmarks developed in Opera's Presto rendering engine and related Opera browsers, please see Opera's archived version history.
Opera downloads for Mac, Windows, and UNIX platforms:
Opera 18.0: Opera highly recommends all users to update to this latest release.
WARNING: These are pre-release builds. Please use them only on properly backed up computers. They contain the latest changes, but may also have severe know issues, including crashes and data loss situations. In fact, they may not work at all.
Legacy version of Opera for Mac, Windows, and UNIX can be found in the Opera archive.
The user agent string for Chromium-based versions of Opera resembles the Chrome string with an additional browser signature:
OPR/[version major].[version minor].[build].[patch] (edition)
This signifies the name of the browser (OPR) followed by a series of numbers denoting the build.
An edition may be included in the string, if the build is from the Developer or Next pre-release streams, or if the build has been custom-made for an Opera partner. For example, a Developer channel release of Opera's partner build with Yandex may have a signature that looks like:
OPR/18.0.1284.26 (Edition Developer-Yx)
The full user agent string looks similar to this:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.48 Safari/537.36 OPR/18.0.1284.26 (Edition Next)
This string will vary depending on your operating system and the build number you are using. Broken down, these objects mean:
Discover when an Opera feature was first introduced into the WebKit/Chromium based browsers (in alphabetical order).
|Combined address and search bar||2013-07-02: 15.0|
|Custom search||2013-10-08: 17.0|
|Media access||2013-11-19: 18.0|
|Mouse gestures||2013-07-02: 15.0|
|Off-Road mode||2013-07-02: 15.0|
|Pin tabs||2013-10-08: 17.0|
|Rocker gestures||2013-11-19: 18.0|
|Speed Dial||2013-07-02: 15.0|
|Opera 18.0||2013-11-19||Final||Chromium 31||V8|
|Opera 17.0||2013-10-08||Final||Chromium 30||V8|
|Opera 16.0||2013-08-27||Final||Chromium 29||V8|
|Opera 15.0||2013-07-02||Final||Chromium 28||V8|
Need help? Hit F1 anytime while using Opera to access our online help files, or go here.