Opera version history

Last update: 2014-10-15

This document provides a quick historical reference to Opera versions, release dates, release streams, rendering engines, JavaScript engine, user agent/ID strings formats, features, and improvements.

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.

Version downloads

Opera downloads for Mac, Windows, and Linux platforms:

Latest Opera features, security and stability release (final)

Opera highly recommends all users to update to the latest release.

Opera pre-release channel builds

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 known issues, including crashes and data loss situations. In fact, they may not work at all.

Archived Opera versions

Legacy version of Opera for Mac, Windows, and Linux can be found in the Opera archive.

User agent string/ID

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 beta 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/25.0.1614.18 (Edition developer-Yx)

The full user agent string looks similar to this:

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.58 Safari/537.36 OPR/25.0.1614.18 (Edition beta)

This string will vary depending on your operating system and the build number you are using. Broken down, these objects mean:

Mozilla/[version]
Signifies the browser is Mozilla compatible.
(Operating system)
Signifies which platform and version of operating system the browser is running on.
AppleWebKit/[build]
Signifies the browser is WebKit compatible.
(Layout engine)
Signifies the layout engine used for rendering. KHTML is open-source and developed by the KDE project.
Chrome/[version, build, and patch]
Signifies the browser is Chrome compatible.
Safari/[build]
Signifies that the browser is Safari compatible.
OPR/[version, build, and patch]
Signifies the Opera browser signature (See above).
(Edition)
Signifies the edition of the Opera browser.

Feature facts

Discover when an Opera feature was first introduced into the WebKit/Chromium based browsers (in alphabetical order).

Feature Introduced
Autofill 2013-08-27: 16.0
Bookmarks bar 2014-01-28: 19.0
Bookmark manager 2014-10-15: 25.0
Combined address and search bar 2013-07-02: 15.0
Custom search 2013-10-08: 17.0
Discover 2013-07-02: 15.0
Extensions 2013-07-02: 15.0
Geolocation 2013-08-27: 16.0
Heart menu 2014-07-22: 23.0
Media access 2013-11-19: 18.0
Mouse gestures 2013-07-02: 15.0
Off-Road mode 2013-07-02: 15.0
opera:flags 2013-08-27: 16.0
Opera Turbo (Turbo 2) 2014-06-03: 22.0
Pin tabs 2013-10-08: 17.0
Rocker gestures 2013-11-19: 18.0
Speed Dial 2013-07-02: 15.0
Stash 2013-07-02: 15.0
Tab previews 2014-09-02: 24.0
Theme creation 2014-01-28: 19.0
Web notifications 2014-10-15: 25.0

Opera 25 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 25.0 2014-10-15 Final Chromium 38 V8
New features:
  • Bookmark manager
  • PDF viewer
  • Web notifications
  • Experimental start page
  • More support for HiDPI video and MP3 audio
  • Network installation on Mac

Opera 24 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 24.0 2014-09-02 Final Chromium 37 V8
New features:
  • Updated Chromium to version 37
  • Stability and security enhancements
  • Tab previews
  • HiDPI improvements on Windows
  • Darker window color for private browsing on Windows

Opera 23 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 23.0 2014-07-22 Final Chromium 36 V8
New features:
  • Updated Chromium to version 36
  • Stability and security enhancements
  • Heart menu in combined search and address bar
  • UI to allow blocked content in secure sessions

Opera 22 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 22.0 2014-06-03 Final Chromium 35 V8
New features:
  • Updated Chromium to version 35
  • Stability and security enhancements
  • HiDPI improvements
  • New default themes

Opera 21 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 21.0 2014-05-06 Final Chromium 34 V8
New features:
  • Updated Chromium to version 34
  • Stability and security enhancements
  • Aura implementation (Windows)
  • Option to display full URL in address bar
  • Broken padlock security badge

Opera 20 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 20.0 2014-03-04 Final Chromium 33 V8
New features:
  • Updated Chromium to version 33
  • Stability and security enhancements
  • Improved Stash screenshots
  • Draggable bookmarks
  • Speed Dial entry manual sizing

Opera 19 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 19.0 2014-01-28 Final Chromium 32 V8
New features:
  • Updated Chromium to version 32
  • Stability and security enhancements
  • Bookmarks bar
  • Theme creation
  • Advanced settings

Opera 18 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 18.0 2013-11-19 Final Chromium 31 V8
New features:
  • Updated Chromium to version 31
  • Stability and security enhancements

Opera 17 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 17.0 2013-10-08 Final Chromium 30 V8
New features:
  • Updated Chromium to version 30
  • Stability and security enhancements
  • Pinned tabs
  • Custom search
  • Startup behavior options

Opera 16 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 16.0 2013-08-27 Final Chromium 29 V8
New features:
  • Updated Chromium to version 29
  • Stability and security enhancements
  • opera:flags experimental test features
  • Geolocation and location sharing
  • Presentation mode for Mac
  • Task bar and start menu integration for Windows 7 and 8

Opera 15 series

Version number Release date Release type Rendering engine JavaScript engine
Opera 15.0 2013-07-02 Final Chromium 28 V8
New features:
  • New rendering engine based on Chromium/Blink
  • New user interface
  • Improved site compatibility
  • Silent auto updates
  • Combined address and search bar
  • Enhanced Speed Dial
  • Stash
  • Discover
  • Off-Road mode

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