Opera version history

Last update: 2013-02-05

This document provides a quick historical reference to Opera versions, release dates, release types, rendering engines, JavaScript engines, user agent/id string formats, features, and improvements. Opera final releases are highlighted in light yellow, with bold text. Versions are hyperlinked to their respective Windows changelog where possible in the "Version number" column of each table.

Important note:
For further detailed information, please see the Opera version release changelogs for Mac, UNIX (FreeBSD and Linux), and Windows operating systems at the Opera Changelogs webpage.

Feature facts

Discover when an Opera feature was first introduced and then made final (in alphabetical order).

Feature Introduced Final release
Acid2 test: passed 2006-03-10: internal 2006-06-20: 9.00 final
Acid3 test: 100/100, pixel perfect 2008-03-26: internal pass
2008-03-28: lab release
2008-12-12: 10.00 alpha		 2009-09-01: 10.00 final
Animations: disable 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Animations: synchronize 2003-08-28: 7.20 beta 2003-09-23: 7.20 final
Atom news feeder 2005-02-25: 8.00 beta 2 2005-04-19: 8.00 final
Auto update 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
BiDi language display 2003-08-28: 7.20 beta 2003-09-23: 7.20 final
BitTorrent 2005-07-07: 8.02 tp 1 2006-04-20: 9.00 beta 1
Block referrer information 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Bookmarks bar 2010-10-21: 11.00 alpha
2010-11-18: 11.00 beta 		2010-12-16: 11.00 final
border-radius 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Browser JavaScript 2005-06-16: 8.01 security
(user option: on/off) 		2005-09-20: 8.50 final
(installation: on by default)
Cache: empty on exit 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Canvas ( <canvas> ) 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Carakan JavaScript engine 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Clear private data 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Cookie manager 2003-04-11: 7.10 final 2003-04-11: 7.10 final
Content blocking 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Crash logging/uploading 2009-02-12: Labs release 2009-09-01: 10.00 final
CSS 1 1998-11-18: 3.50 final 1998-11-18: 3.50 final
CSS 2 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
CSS cursor -o- property values
  • "-o-zoom-in"
  • "-o-zoom-out"
 2011-03-17: 11.10 beta
CSS Selectors API 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
CSS System Colors 2001-04-10: 5.10 final 2001-04-10: 5.10 final
CSS Multi-column Layout 2011-03-17: 11.10 beta
CSS Device Adaptation (viewport) 2011-03-17: 11.10 beta
CSS3 Backgrounds and Borders 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
CSS3 Gradients (partial) 2011-03-17: 11.10 beta
CSS3 Transforms and Transitions 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Declarative UI 2011-03-17: 11.10 beta
Default accept header:
  • application/xmlreplaces
    application/xhtml+xml
2003-08-28: 7.20 beta 2003-09-23: 7.20 final
Developer Tools 2007-03-28: 9.20 beta 2007-04-11: 9.20 final
DOM Level 1 2002-11-13: 7.00 beta 1 (partial) 2003-01-28: 7.00 final (full)
DOM Level 2 2002-11-13: 7.00 beta 1 (partial) 2006-06-20: 9.00 final (full)
DOM Level 3 2004-08-24: 7.60 tech preview 1 (partial) 2008-10-08: 9.60 final (improved)
Domain names: internationalized 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Download/transfer manager 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Download accelerator software compatibility 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Dynamic HTML (DHTML) 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
ECMAScript: initial 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
ECMAScript: full 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Email and news client: introduced 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Encryption: 128 bit 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Extensions 2010-10-21: 11.00 alpha
2010-11-18: 11.00 beta 		2010-12-16: 11.00 final
Fast Forward 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Feed Preview 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
File API - W3C
(partial support) 		2011-04-12: 11.10 final 2011-04-12: 11.10 final
File Sharing (Opera Unite) 2009-06-16: 10.50 alpha 2010-03-02: 10.50 final
File Upload 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Fit to Window Width 2004-12-23: 8.00 beta 1 2005-04-19: 8.00 final
Flash plug-in (Windows) 2004-05-12: 7.50 final 2004-05-12: 7.50 final
Follow/Ignore threads & contacts 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
FPS in SVG 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Frames: capabilities 1996-09: 2.10 beta 1 1996-12-09: 2.10 final
Frames: disable 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Fraud Protection 2006-12-18: 9.10 final 2006-12-18: 9.10 final
Fridge (Opera Unite) 2009-06-16: 10.10 alpha
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Full-text indexing of e-mails 2004-04-22: 7.50 beta 1 2004-05-12: 7.50 final
Futhark JavaScript engine 2007-10-25: 9.50 beta 1 2008-06-12: 9.50 final
Geolocation services 2009-03-26: 10.60 alpha
2010-06-16: 10.60 beta 1 		2010-07-01: 10.60 final
Go To Thread 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
Home pages (multiple) 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Horizontal panning 2003-09-23: 7.20 final 2003-09-23: 7.20 final
Hotclick 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Hotlist panels 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
HTML authoring in Opera Mail 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
HTML 3.0 1996-09: 2.10 beta 1 1996-12-09: 2.10 final
HTML 4.0 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
HTML5 Parser 2011-10-13: 12.00 alpha
HTTP 1.1 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
ICQ chat client 2000-12-06: 5.00 final 2000-12-06: 5.00 final
Image control per window
(on/off/loaded) 		1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Images:
Multiple graphics formats
  • .JPG
  • .GIF
  • .XBM
  • .BMP
  • .AVI video
  • Animated .GIF
  • MPEG video
 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Images: disable 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Inline spell check 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
IPv6: experimental 2003-08-28: 7.20 beta 2003-09-23: 7.20 final
IRC (Internet Relay Chat) 2004-04-22: 7.50 beta 1 2004-05-12: 7.50 final
JavaScript 1.3 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
JSON (native) 2010-02-11: 10.50 beta 1 2010-03-02: 10.50 final
Keyboard interface 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Kiosk mode 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Linear A JavaScript engine 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Linear B JavaScript engine 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Low Bandwidth mode 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
mailto:and feeds:
  • use webmail clients and
    online feed readers as
    default handlers
 2008-01-13: 10.00 Labs release 2009-09-01: 10.00 final
MathML 2008-04-24: 9.50 beta 2 2008-06-12: 9.50 final
Media Player (Opera Unite) 2009-06-16: 10.10 alpha
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Media Queries (CSS3 aspect ratios) 2003-09-23: 7.20 final 2003-09-23: 7.20 final
Messenger (Opera Unite) 2009-06-16: 10.10 alpha
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Mouse button reversing 2001-04-10: 5.10 final 2001-04-10: 5.10 final
Mouse Gestures 2001-04-10: 5.10 final 2001-04-10: 5.10 final
Multi-item Hot List 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Multiple document browsing ( MDI) 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Multimedia preferences:
  • JavaScript options
 2003-09-23: 7.20 final 2009-09-23: 7.20 final
NNTP client 1996-07-14: 2.00 final 1996-07-14: 2.00 final
Non-modal notification message 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
<noscript> HTML compliance 2001-04-10: 5.10 final 2001-04-10: 5.10 final
Notes 2003-04-11: 7.10 final 2003-04-11: 7.10 final
NTLM (Windows only) 2006-06-20: 9.00 final 2006-09-21: 9.02 security
Offline mode 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Offline Web Applications 2010-06-16: 10.60 beta 1 2010-07-01: 10.60 final
opera:config:
  • Advanced settings configuration
 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Opera Dragonfly alpha 2008-06-12: 9.50 final 2010-03-02: 10.50 final
Opera Dragonfly 2011-03-17: 11.10 beta 2011-05-05: 11.50 alpha
Opera Link synchroniation of:
  • Synchronized Bookmarks
  • Personal bar
  • Speed Dial
  • Notes
 2007-10-25: 9.50 beta 1 2008-06-12: 9.50 final
Opera Link:
  • Synchronized searches
  • Typed history
 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
Opera Link:
  • Password Synchronization
 2011-05-03: 11.50 alpha
Opera Mail and news client 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Opera Mail improvements:
  • Added phrase searching
 2011-03-17: 11.10 beta
Opera Next:
  • A dev channel for snapshots
 2011-05-03: 11.50 alpha
Opera Presto 2.9 2011-06-20: 11.50 beta 2011-06-28: 11.50 final
Opera Presto 2.8 2011-02-17: 11.10 alpha 2011-04-12: 11.10 final
Opera Presto 2.7 2010-10-21: 11.00 alpha 2010-12-16: 11.00 final
Opera Presto 2.6 2010-05-31: 10.60 alpha 2010-06-01: 10.60 final
Opera Presto 2.5 2009-12-22: 10.50 beta 2010-03-02: 10.50 final
Opera Presto 2.4 2009-11-02: Mobile 10 beta 2010-03-16: Mobile 10 final
Opera Presto 2.3 2009-05-21: Devices SDK 10 beta 2009-09-08: Devices SDK 10 final
Opera Presto 2.2 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Opera Presto 2.1.1 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
Opera Presto 2.1 2007-10-25: 9.50 beta 2008-06-12: 9.50 final
Opera Presto 2.0 2005-10-20: 9.00 tech preview 2006-06-20: 9.00 final
Opera Presto 1.0 2002-11-13: 7.00 beta 2003-01-28: 7.00 final
Opera Show:
  • CSS @media rules
 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Opera Turbo (for Desktop) 2009-03-13: 10.00 labs release 2009-09-01: 10.00 final
Opera Turbo (for Mobile) 2009-02-12: Mobile 9.50 beta 2009-06-08: Mobile 9.70 beta
Opera Unite 2009-06-16: 10.10 labs release
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Opera Widgets for Desktop 2009-10-15: 10.20 labs release
2009-11-25: 10.20 alpha 		2010-03-02: 10.50 final
Page load: local & external 1996-09: 2.10 beta 1 1996-12-09: 2.10 final
Panels (formerly Hotlist panels)
  • Windows
  • Links
  • Transfers
 2002-11-13: 7.00b1 2003-01-28: 7.00 final
Personal bar 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Photo Sharing (Opera Unite) 2009-06-16: 10.10 alpha
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Plug-in installation wizard 2011-03-17: 11.10 beta
PNG alpha transparency 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Pop-ups: notification of blocked 2004-12-23: 8.00 beta 1 2005-04-19: 8.00 final
Pretty-printing of unstyled XML 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Print preview 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Private browsing 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Progress indicator: inline 2001-04-10: 5.10 final 2001-04-10: 5.10 final
Quick: internal, cross-platform GUI toolkit 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Quick Find: browsing history search 2007-10-25: 9.50 beta 1 2008-06-12: 9.50 final
RAM Cache 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Reflow:
  • Page
  • Document
 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Rewind 2003-04-11: 7.10 final 2003-04-11: 7.10 final
RGBA & HSLA opacity 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Rich text editing 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
RSS news feeder 2004-04-22: 7.50 beta 1 2004-05-12: 7.50 final
Scroll Marker 2008-09-10: 9.60 beta 2008-10-08: 9.60 final
SDI/MDI mode 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Search editor 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Search field on error pages 2011-03-17: 11.10 beta
Search field on toolbar 2000-12-06: 5.00 final 2000-12-06: 5.00 final
Search fully integrated 2001-04-10: 5.10 final 2001-04-10: 5.10 final
Search predictions 2010-10-21: 11.00 alpha
2010-11-18: 11.00 beta 		2010-12-16: 11.00 final
Search resizable field 2009-03-13: 10.00 labs release 2009-09-01: 10.00 final
Session history & navigation (HTML5) 2011-05-31: 11.50 beta
Sessions 1994-11: 1.00 beta 1996-12-09: 2.10 final
Setups: simple, advanced, etc. 1994-11: 1.00 beta 1995-04-10: 1.00 final (internal)
Skins:
  • Skin choices enabled
 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Skins:
  • New elements
 2009-06-03: 10.00 beta 1 2009-09-01: 10.00 final
Skins:
  • GIF buttons
  • JPG buttons
 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Site preferences 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Small-screen rendering 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Sounds 1997-02-12: 2.12 final 1997-02-12: 2.12 final
Source viewer:
  • Integrated
 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Spatial Navigation 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Speed Dial 2007-03-28: 9.20 beta 2007-04-11: 9.20 final
Speed Dial config options 2009-06-03: 10.00 beta 2009-09-01: 10.00 final
Speed Dial extensions 2011-05-03: 11.50 alpha
Speed Dial improvements:
  • Animation
  • Flow layout
  • Logo finder
  • Column number adjustment
  • Adding/editing dialogue
  • Create custom titles
  • Zoom
 2011-03-17: 11.10 beta
SMTP client 1996-07-14: 2.00 final 1996-07-14: 2.00 final
SSL 2 and 3 2000-03-28: 4.00 tech preview 2000-06-28: 4.00 final
Start-up dialog 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Sun Java Plug-in 1.3 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
SVG as:
  • <img>in HTML
  • url() in CSS
 2007-10-25: 9.50 beta 1 2008-06-12: 9.50 final
SVG declarative animation
  • As in SVG 1.1 Tiny
 2005-03-16: 8.00 beta 3 2005-04-19: 8.00 final
SVG fonts in HTML 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Tab browsing ( TDI) 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
Tab drag-and-drop 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
Tab stacking 2010-10-21: 11.00 alpha
2010-11-18: 11.00 beta 		2010-12-16: 11.00 final
TLS 1.0 1998-11-18: 3.50 final 1998-11-18: 3.50 final
Unicode character standard 2001-11-13: 6.00 beta 1 2001-12-18: 6.00 final
Updates:
  • Automated weekly check
 2004-12-23: 8.00 beta 1 2005-04-19: 8.00 final
URL Filter API for Opera extensions 2001-03-17: 11.10 beta
User CSS 1998-11-18: 3.50 final 1998-11-18: 3.50 final
User JavaScript 2005-04-19: 8.00 final 2005-04-19: 8.00 final
User JavaScript additions:
  • BeforeCSS event
  • AfterCSS event
 2011-03-17: 11.10 beta 2011-04-12: 11.10 final
Users:
  • Allow multiple users on Windows
 2003-04-11: 7.10 final 2003-04-11: 7.10 final
<video> HTML5 2007-11-07: 9.52 pre-alpha 2010-03-02: 10.50 final
visibility:collapse 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Visual mouse gestures 2010-10-21: 11.00 alpha
2010-11-18: 11.00 beta 		2010-12-16: 11.00 final
Visual tabs 2008-06-03: 10.00 beta 1 2009-09-01: 10.00 final
Voice:
  • Full capability
  • Navigation
 2004-03-23: 7.30 special 2005-04-19: 8.00 final
Wand/Password manager 2003-04-11: 7.10 final 2003-04-11: 7.10 final
Web Fonts 2008-12-12: 10.00 alpha 2009-09-01: 10.00 final
Web Forms 2 2005-10-20: 9.00 tp 2006-06-20: 9.00 final
Web Open Font Format (WOFF) 2011-03-17: 11.10 beta
Web Server (Opera Unite) 2009-06-16: 10.10 alpha
2009-10-14: 10.10 beta 1 		2009-11-23: 10.10 final
Web SQL Database 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Web Storage 2009-12-16: 10.50 pre-alpha 2010-03-02: 10.50 final
Web Workers 2010-06-16: 10.60 beta 1 2010-07-01: 10.60 final
WebGL 2011-10-13: 12.00 alpha
WebM 2010-05-31: 10.60 alpha
2010-06-16: 10.60 beta 1		 2010-07-01: 10.60 final
WebP 2011-03-17: 11.10 beta
Web Open Font Format (WOFF) 2011-02-17: 11.10 alpha
WebSockets 2010-10-21: 11.00 alpha
2010-11-18: 11-00 beta 		2010-12-16: 11.00 final
Widgets 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
WML: experimental 2000-03-20: 4.00 tech preview 2000-06-28: 4.00 final
WML: 1.3 and 2.0 2002-11-13: 7.00 beta 1 2003-01-28: 7.00 final
XHTML namespace 2001-04-10: 5.10 final 2001-04-10: 5.10 final
XML 1.0 2000-05-17: 4.00 beta 4 2000-06-28: 4.00 final
XML 1.1 2005-10-20: 9.00 beta 1 2006-06-20: 9.00 final
XMLHttpRequest 2004-12-23: 8.00 beta 1 2005-04-19: 8.00 final
XPath 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
XSLT 2006-04-20: 9.00 beta 1 2006-06-20: 9.00 final
Zoom (20% to 1000%) 1996-09: 2.10 beta 1 1996-12-09: 2.10 final

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Version downloads

Opera downloads for Mac, UNIX (FreeBSD/Linux), and Windows platforms:

Latest Opera features, security, and stability release (final)

Opera 12.15: Opera highly recommends all users to update to this latest release.

Latest Opera pre-release builds (alphas, betas, lab releases, snapshots)

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.

Opera Next downloads

Archived Opera versions

Legacy versions of Opera for Mac, UNIX, and Windows can be found at the Opera archive.

User agent string/id formats

Opera user agent string/id formats are described with string order and examples.

Opera user agent string/id references:
The User Agent String and Opera
Changes in Opera's user agent string format
Opera Presto in the the Opera User-Agent string

User agent string/id items in descending order

Opera versions will use all or some parts of the following user agent string/id items. Examples of the different types of Opera user agent string/id formats are shown following these definitions.

Browser signature: Opera/9.80
Signifies the name of the browser followed by a single digit prefix version number (9) which is used for compatibility purposes.
  • Most browser sniffing scripts are not ready for this change to double digits (Opera "10"), as they detect only the first digit of the user agent string meaning Opera "10" is interpreted as Opera "1" (note that the real version number is provided at the end of the UA string in the examples shown below). This results in sites mistakenly identifying Opera 10 as an unsupported browser thereby breaking server and client-side scripts.
Operating system signature
Identifies the name and version number of an operating system (FreeBSD, Linux, Mac, Solaris, or Windows).
  • FreeBSD
    • X11; FreeBSD (version no.) i386
    • X11; FreeBSD (version no.) AMD64
  • Linux
    • X11; Linux ppc
    • X11; Linux ppc64
    • X11; Linux i686
    • X11; Linux x86_64
  • Mac
    • Macintosh; PPC Mac OS X
    • Macintosh; Intel Mac OS X
  • Solaris
    • X11; SunOS i86pc
    • X11; SunOS sun4u
  • Windows:
    • Windows NT 6.1
    • Windows NT 6.0
    • Windows NT 5.2
    • Windows NT 5.1
    • Windows ME
    • Windows 98
Security encryption level signature
Based on the former security encryption levels set by the Unted States government:
  • N: Signifies no security encryption.
  • I: Signifies weak security encryption; formerly meaning "I"nternational weak encryption for which the U.S. government will grant an export license.
  • U: Signifies strong security encryption; formerly meaning "U".S. government high-quality encryption that could not be exported from the United States.
ISO signature (human language tag)
Indicates the human language for which the client (browser) is localized.
Rendering engine/number
This is the Opera rendering engine name and its version number.
Version/number
This indentifies the real version number of this version of Opera.

Opera user agent string examples

Opera 11.xx versions
Opera/9.80 (Windows NT 5.1; U; en) Presto/2.8.119 Version/11.10
Opera 10.xx versions
Opera/9.80 (Macintosh; Intel Mac OS X; U; en) Presto/2.2.15 Version/10.10
Opera 9.60 thru 9.64 versions
Opera/9.64 (Windows NT 5.1; U; en) Presto/2.1.1
Early versions of Opera thru the 9.52 version
Opera/9.50 (X11; Linux x86_64; U; pl)

Technical resources

External hyperlinks to Opera articles and specifications provide further reference.

Quick pick

Navigation is provided to each Opera series and version.

Series Versions
Opera 12.xx
12.15, 12.14, 12.13, 12.12, 12.11, 12.10, 12.10b, 12.02, 12.01, 12.00, 12.00b, 12.00a
Opera 11.xx
11.64, 11.62, 11.61, 11.60, 11.60b
11.52, 11.51, 11.50, 11.50b, 11.50a
11.11, 11.10, 11.10b, 11.10a
11.01, 11.00, 11.00b, 11.00a
Opera 10.xx
10.70lr
10.63, 10.62, 10.61, 10.60, 10.60b1, 10.60a
10.54, 10.53, 10.52, 10.51, 10.50, 10.50b2, 10.50b1, 10.50pa
10.20a, 10.20lr
10.11
10.10, 10.10b1, 10.10lr
10.01, 10.00, 10.00b3, 10.00b2, 10.00b1, 10.00a
Opera 9.xx 9.64, 9.63, 9.62, 9.61, 9.60, 9.60b
9.52, 9.51, 9.50, 9.50b2, 9.50b1
9.27, 9.26, 9.25, 9.24, 9.23, 9.22, 9.21, 9.20, 9.20b
9.10
9.02, 9.01, 9.00, 9.00b2, 9.00b1, 9.00tp
Opera 8.xx
8.54, 8.53, 8.52, 8.51, 8.50 "Bolton"
8.02, 8.01, 8.00, 8.00b3, 8.00b2, 8.00b1
Opera 7.xx
7.60tp4, 7.60tp3, 7.60tp2, 7.60tp1
7.55, 7.54ud2, 7.54ud1, 7.54, 7.53, 7.52, 7.51, 7.50, 7.50b1
7.30
7.23, 7.22, 7.21, 7.20, 7.20b
7.11, 7.10
7.03, 7.02, 7.01 "Bork", 7.01, 7.00, 7.00b2, 7.00b1v2, 7.00b1
Opera 6.xx
6.10
6.06, 6.05, 6.04, 6.03, 6.02, 6.01, 6.00, 6.00b
Opera 5.xx
5.12, 5.11, 5.10
5.02, 5.01, 5.00
Opera 4.xx
4.02, 4.01, 4.00, 4.00b6, 4.00b5, 4.00b4, 4.00b3, 4.00b2, 4.00tp
Opera 3.xx
3.62, 3.62b, 3.61, BeOS beta, 3.60
3.51 3.50
3.21
3.10
3.00, 3.00b
Opera 2.xx
2.12, 2.10, 2.10b3, 2.10b2, 2.10b1
2.00, 2.00cd
Opera 1.xx
1.00

Opera 12 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 12.15 2013-04-04 Security & Stability Marlin Opera Presto 2.12 Carakan
Opera 12.14 2013-02-05 Security & Stability Marlin Opera Presto 2.12 Carakan
Opera 12.13 2013-01-30 Security & Stability Marlin Opera Presto 2.12 Carakan
Opera 12.12 2012-12-18 Security & Stability Marlin Opera Presto 2.12 Carakan
Opera 12.11 2012-11-20 Security & Stability Marlin Opera Presto 2.12 Carakan
Opera 12.10 2012-11-06 Final Marlin Opera Presto 2.12 Carakan
New and improved features:
  • Improved operating system compatibility
  • Extensions support enhanced and expanded
  • High-resolution Display Support
  • SPDY
  • CSS3 Gradients, Transitions, Animations, and Transforms
  • CSS Site Compatibility
  • Fullscreen API
  • Page Visibility API
  • WebSockets
  • ICC Profiles
Opera 12.10b 2012-10-02 Beta Marlin Opera Presto 2.12 Carakan
Opera 12.02 2012-08-30 Security & Stability Wahoo Opera Presto 2.10 Carakan
Opera 12.01 2012-08-02 Security & Stability Wahoo Opera Presto 2.10 Carakan
Opera 12.00 2012-06-14 Final Wahoo Opera Presto 2.10 Carakan
New and improved features:
  • Out-of-Process plug-ins
  • 64-bit Mac and Windows versions
  • Mail and address field interface enhancements
  • Updated skinning system - Themes
  • Enhanced Windows and Tabs API
  • Right-to-Left (RTL) Script Support
  • Improved CSS calculation precision
  • Improved Media Query support
  • HTML5 Drag-and-Drop
  • opera:cpu to monitor CPU usage of Opera processes
  • Support for getUserMedia
  • CSS3 Animations and Transitions
  • Do-Not-Track header
  • Support for Paged Overflow
  • Cross-Origin Resource Sharing (CORS)
  • Opera Unite, Opera Widgets and Opera voice discontinuation
  • Removal of BitTorrent and IRC on Opera for Mac
Opera 12.00b 2012-04-26 Beta Wahoo Opera Presto 2.10 Carakan
Opera 12.00a 2011-10-13 Alpha Wahoo Opera Presto 2.9 Carakan

Opera 11 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 11.64 2012-05-10 Security & Stability Tunny Opera Presto 2.10 Carakan
Opera 11.62 2012-03-27 Security & Stability Tunny Opera Presto 2.10 Carakan
Opera 11.61 2012-01-24 Security & Stability Tunny Opera Presto 2.10 Carakan
Opera 11.60 2011-12-06 Final Tunny Opera Presto 2.10 Carakan
New and improved features:
  • Opera Presto 2.10 rendering engine
  • Featherweight address field with star menu
  • Improved user interface for Mail
  • Grouping and pinning of messages
  • New mail settings dialog
  • HTML5 parser
  • Improved HTML5 media support
  • DOM API for HTML5 microdata
  • HTML5 custom scheme and content handlers
  • ECMAScript 5.1
  • Improved support for XMLHttpRequest Level 2
  • Full support for radial-gradient
  • Support for font-relative length rem
  • Support for the image-rendering property
Opera 11.60b 2011-11-10 Beta Tunny Opera Presto 2.10 Carakan
Opera 11.52 2011-10-19 Security & Stability Swordfish Opera Presto 2.9 Carakan
Opera 11.51 2011-08-31 Security & Stability Swordfish Opera Presto 2.9 Carakan
Opera 11.50 2011-06-28 Final Swordfish Opera Presto 2.9 Carakan
New and improved features:
  • Opera Presto 2.9 rendering engine
  • Opera Dragonfly 1.0 (2011-05-05)
  • Opera Link: Password synchronization
  • Opera Next: Dev channel for snapshots
  • Plug-in installation wizard (Mac)
  • Speed Dial extensions
  • Improved user interface
  • Improved deep nesting of CSS quotes
  • Improved Opera Widgets support
  • Improved DOM event handling
  • Improved Selectors API support
  • HTML5 dataset element support
  • HTML5 Session history & navigation support
  • HTML5 and SVG classList attribute support
  • HTML5 time element support
Opera 11.50b 2011-05-31 Beta Swordfish Opera Presto 2.8 Carakan
Opera 11.11 2011-05-18 Security & Stability Barracuda Opera Presto 2.8 Carakan
Opera 11.50a 2011-05-03 Alpha Swordfish Opera Presto 2.8 Carakan
Opera 11.10 2011-04-12 Final Barracuda Opera Presto 2.8 Carakan
New features:
  • Opera Presto 2.8 rendering engine
  • Plug-in installation wizard (Windows)
  • Added Search field to error pages
  • Added support for SOCKS Protocol v.5
  • Opera CSS cursor property values:
    • "zoom-in"
    • "zoom-out"
  • User JavaScript:
    • Added event: BeforeCSS
    • Added event: AfterCSS
  • URL Filter API for Opera extensions
  • WebP
  • W3C CSS Multi-column Layout
  • W3C CSS Device Adaptation (viewport)
  • W3C CSS3 Gradients (partial support)
  • W3C Web Open Font Format (WOFF)
  • W3C File API (partial support)
Improvements:
  • Declarative UI
  • Opera Dragonfly beta 1
  • Opera Mail:
    • Phrase searching support
    • CJK search improvements
    • Mail panel improvements
  • Speed Dial:
    • Added a new "logo finder" to dials
    • Added ability to create custom titles
    • Added animation
    • Added column number adjustment
    • Added zoom
    • Improved flow layout
    • New dialog when adding/editing
    • Sites can now reload Speed Dials automatically
    • The thumbnail/icon can now be chosen
Opera 11.10b 2011-03-17 Beta Barracuda Opera Presto 2.8 Carakan
Opera 11.10a 2011-02-17 Alpha Barracuda Opera Presto 2.8 Carakan
Opera 11.01 2011-01-27 Security Kjevik Opera Presto 2.7 Carakan
Opera 11.00 2010-12-16 Final Kjevik Opera Presto 2.7 Carakan
New features:
  • Bookmarks bar
  • Opera extensions
  • Presto 2.7 rendering engine:
    • WebSockets support
    • Improved CSS3 Paged Media support
    • Improved CSS3 Text support
    • Improved Encodings support
    • Improved HTML5 support
  • Search predictions
  • Tab stacking
  • Visual mouse gestures
Improvements:
  • Address field
  • Auto-update
  • Carakan JavaScript engine
  • Mail panel
  • Plug-in loading
  • User JavaScript
Opera 11.00b 2010-11-23 Beta Kjevik Opera Presto 2.7 Carakan
Opera 11.00a 2010-10-21 Alpha Kjevik Opera Presto 2.7 Carakan

Opera 10 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 10.63 2010-10-12 Security Evenes Opera Presto 2.6 Carakan
Opera 10.62 2010-09-09 Security Evenes Opera Presto 2.6 Carakan
Opera 10.61 2010-08-12 Security Evenes Opera Presto 2.6 Carakan
Opera 10.70lr 2010-08-03 Lab release Evenes Opera Presto 2.6 Carakan
Opera 10.60 2010-07-01 Final Evenes Opera Presto 2.6 Carakan
New features:
  • Presto 2.6 rendering engine:
    • Geolocation services
    • Offline Web Applications
    • Web Workers
    • WebM
Opera 10.11
(for UNIX) 		2010-06-23 Security Peregrine Opera Presto 2.2 Futhark
Opera 10.54 2010-06-21 Security Evenes Opera Presto 2.5 Carakan
Opera 10.60b1 2010-06-16 Beta Evenes Opera Presto 2.5 Carakan
Opera 10.60a 2010-05-31 Alpha Evenes Opera Presto 2.5 Carakan
Opera 10.53 2010-04-30 Security Evenes Opera Presto 2.5 Carakan
Opera 10.52 2010-04-27 Stability Evenes Opera Presto 2.5 Carakan
Opera 10.51 2010-03-22 Security Evenes Opera Presto 2.5 Carakan
Opera 10.50 2010-03-02 Final Evenes Opera Presto 2.5 Carakan
New features:
  • Carakan JavaScript engine
  • Presto 2.5 rendering engine
    • Native JSON support
    • CSS 2.1 visibility: collapse
    • CSS3 border-radius property
    • CSS3 Backgrounds and Borders
    • CSS3 Transforms and Transitions
    • HTML5 <video> element
    • Web Storage: session and local
    • Web SQL Databases
  • Opera Widgets for Desktop
    • Application mode
    • Context menu
    • Control buttons
    • Debugging
    • Export wizard
    • Managing passwords
    • Notification system
    • Widget download process
    • Widget File I/O
    • Widget install/uninstall process
  • Vega graphics library
  • Better integration with native operating systems
  • Download accelerator software compatibility
  • Private browsing
  • Non-modal notification messages
  • Opera "O" menu tab
Improvements:
  • Search box
  • Address box
  • Cache interface
  • Opera Dragonfly debugger
  • Inline page search
  • Password manager
  • Zoom facility
Opera 10.50b2 2010-02-24 Beta Evenes Opera Presto 2.5 Carakan
Opera 10.50b1 2010-02-11 Beta Evenes Opera Presto 2.5 Carakan
Opera 10.50a 2009-12-22 Alpha Evenes Opera Presto 2.5 Carakan
Opera 10.20a 2009-11-25 Alpha Peregrine Opera Presto 2.2 Futhark
Opera 10.10 2009-11-23 Final Peregrine Opera Presto 2.2 Futhark
New feature: Opera Unite
  • Opera Unite applications:
    • File Sharing
    • Fridge
    • Media Player
    • Messenger
    • Photo Sharing
    • Web Server
Opera 10.01 2009-10-28 Security Peregrine Opera Presto 2.2 Futhark
Opera 10.20lr 2009-10-15 Labs release Peregrine Opera Presto 2.2 Futhark
Feature: Opera Widgets for Desktop
  • Widget management and lifespans are separated from the Opera desktop browser.
Opera 10.10b1 2009-10-14 Beta Peregrine Opera Presto 2.2 Futhark
Opera 10.00 2009-09-01 Final Peregrine Opera Presto 2.2 Futhark
New features:
  • Acid3 test: 100/100, pixel-perfect
  • Auto update
  • Crashlogging tool (integrated)
  • CSS Selectors API support
  • FPS in SVG support
  • HTML authoring in Opera Mail
  • Inline spell check
  • New regular expression engine
  • New skin elements
  • Opera Dragonfly: HTTP header inspection
  • Opera Dragonfly: DOM editing
  • Opera Presto 2.2 rendering engine
  • Opera Speed Dial configuration options
  • Opera Turbo
  • Pretty-printing of unstyled XML
  • RGBA & HSLA opacity
  • SVG fonts in HTML support
  • Visual tabs
  • Web fonts support
Opera 10.00b3 2009-08-13 Beta Peregrine Opera Presto 2.2 Futhark
Opera 10.00b2 2009-07-16 Beta Peregrine Opera Presto 2.2 Futhark
Opera 10.10lr 2009-06-16 Lab release Peregrine Opera Presto 2.2 Futhark
New feature: Opera Unite
  • Opera Unite gives you the power to connect with others directly and to collaborate and share information from your computer without storing any data on external servers.
Opera 10.00b1 2009-06-03 Beta Peregrine Opera Presto 2.2 Futhark
Opera 10.00a 2008-12-12 Alpha Peregrine Opera Presto 2.2 Futhark

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Opera 9 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 9.64 2009-03-03 Security Kestrel Opera Presto 2.1.1 Futhark
Opera 9.63 2008-12-16 Security Kestrel Opera Presto 2.1.1 Futhark
Opera 9.62 2008-10-30 Security Kestrel Opera Presto 2.1.1 Futhark
Opera 9.61 2008-10-21 Security Kestrel Opera Presto 2.1.1 Futhark
Opera 9.60 2008-10-08 Final Kestrel Opera Presto 2.1.1 Futhark
New features:
  • Opera Scroll Marker
  • Feed Preview
  • Follow/Ignore threads and contacts
  • Go To Thread
  • Low Bandwidth Mode
Opera 9.60b 2008-09-10 Beta Kestrel Opera Presto 2.1.1 Futhark
Opera 9.52 2008-08-20 Security Kestrel Opera Presto 2.1 Futhark
Opera 9.51 2008-07-03 Security Kestrel Opera Presto 2.1 Futhark
Opera 9.50 2008-06-12 Final Kestrel Opera Presto 2.1 Futhark
New features:
  • Opera Dragonfly debugger (alpha)
  • Opera Link
  • Opera Quick Find
  • Support for Extended Validation
  • Alternative tab-closing behaviors
  • Address field notification scheme
  • MathML support
  • SVG external references:
    • <use>, <animation>, <image>

  • SVG as CSS:
    • background-image
    • list-style-image
  • SVG Tiny 1.2:
    • Keyboard navigation
    • Editable text
  • SVG as:
    • <img>in HTML
    • url() in CSS
Opera 9.50b2 2008-04-24 Beta Kestrel Opera Presto 2.1 Futhark
Opera 9.50b1 2007-10-25 Beta Kestrel Opera Presto 2.1 Futhark
Opera 9.27 2008-04-03 Security Merlin Opera Presto 2.0 Linear B
Opera 9.26 2008-02-20 Security Merlin Opera Presto 2.0 Linear B
Opera 9.25 2007-12-19 Security Merlin Opera Presto 2.0 Linear B
Opera 9.24 2007-10-17 Security Merlin Opera Presto 2.0 Linear B
Opera 9.23 2007-08-15 Security Merlin Opera Presto 2.0 Linear B
Opera 9.22 2007-07-19 Security Merlin Opera Presto 2.0 Linear B
Opera 9.21 2007-05-21 Security Merlin Opera Presto 2.0 Linear B
Opera 9.20 2007-04-11 Final Merlin Opera Presto 2.0 Linear B
New features:
  • Speed Dial
  • Developer Tools
Opera 9.20b 2007-03-28 Beta Merlin Opera Presto 2.0 Linear B
Opera 9.10 2006-12-18 Final Merlin Opera Presto 2.0 Linear B
New features:
  • Fraud Protection
Opera 9.02 2006-09-21 Security Merlin Opera Presto 2.0 Linear B
Opera 9.01 2006-08-02 Security Merlin Opera Presto 2.0 Linear B
Opera 9.00 2006-06-20 Final Merlin Opera Presto 2.0 Linear B
New features:
  • Canvas (<canvas>) support
  • Web Forms 2
  • Acid2 Test: passed
  • Content blocking
  • BitTorrent support
  • Widgets
  • Search engine editor
  • Rich text editing
  • XML 1.1 support
  • XSLT and XPath support
  • Site preferences
  • New installer: one package, 30 languages
  • Source viewer: Opera original, fully integrated
  • NTLM support (Windows only)
  • opera:config for advanced settings configuration
Opera 9.00b2 2006-05-23 Beta Merlin Opera Presto 2.0 Linear B
Opera 9.00b1 2006-04-20 Beta Merlin Opera Presto 2.0 Linear B
Opera 9.00tp 2005-10-20 Tech Preview Merlin Opera Presto 2.0 Linear B

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Opera 8 series

Historical note
Project names were first assigned and made public starting with the Opera 9 series (Merlin). Previous to Opera 9.00 TP, projects were classified with internal branch numbers and not publicized. The Project name data cells in the following Opera version tables are identified as Internal.
Historical note
Opera 8.50 "Bolton" version: The Opera 8.50 "Bolton" version permanently removed the ad banner and licensing fee from the browser. Opera was previously available free of charge with an ad banner. Users had the option of paying a license fee to remove the ad banner and receive premium support.
Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 8.54 2006-04-05 Security Internal Opera Presto 1.0 Linear B
Opera 8.53 2006-03-02 Security Internal Opera Presto 1.0 Linear B
Opera 8.52 2006-02-17 Security Internal Opera Presto 1.0 Linear B
Opera 8.51 2005-11-22 Security Internal Opera Presto 1.0 Linear B
Opera 8.50
("Bolton") 		2005-09-20 Final Internal Opera Presto 1.0 Linear B
New features:
  • 1st completely free download version (ad-free toolbar)
  • Browser JavaScript: "on" by default with installation
Opera 8.02 2005-07-28 Security Internal Opera Presto 1.0 Linear B
Opera 8.01 2005-06-16 Security Internal Opera Presto 1.0 Linear B
Feature: Browser JavaScript introduced with user on/off option
Opera 8.00 2005-04-19 Final Internal Opera Presto 1.0 Linear B
New features:
  • SVG support for:
    • Declarative SVG animation (SVG 1.1 Tiny)
  • Full Voice capability & navigation
  • User JavaScript
  • Fit to Window Width
  • XMLHttpRequestsupport
  • Notification of blocked pop-ups
  • Automated weekly update check
  • Atom news feeder support
Opera 8.00b3 2005-03-16 Beta Internal Opera Presto 1.0 Linear B
Opera 8.00b2 2005-02-25 Beta Internal Opera Presto 1.0 Linear B
Opera 8.00b1 2004-12-23 Beta Internal Opera Presto 1.0 Linear B

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Opera 7 series

Historical note
Opera 7.01 "Bork" version: Microsoft's MSN portal targeted Opera users by purposely providing them with a broken page. As a reply to MSN's treatment of its users, Opera Software released a very special Bork version of its Opera 7 for Windows browser. The Bork version behaves differently on one Web site: MSN. Users accessing the MSN site will see the page transformed into the language of the famous Swedish Chef from the Muppet Show: Bork, Bork, Bork! Further information regarding the Opera 7.01 "Bork" version is available from our press release.
Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 7.60tp4 2004-12-03 Tech Preview Internal Opera Presto 1.0 Linear B
Opera 7.60tp3 2004-11-12 Tech Preview Internal Opera Presto 1.0 Linear B
Opera 7.60tp2 2004-10-26 Tech Preview Internal Opera Presto 1.0 Linear B
Opera 7.60tp1 2004-08-24 Tech Preview Internal Opera Presto 1.0 Linear B
Opera 7.55 2005-01-09 Special Internal Opera Presto 1.0 Linear B
New features:
  • 2nd release as part of IBM Websphere Multimodal extension toolkit
  • Improved Voice capability
Opera 7.54ud2 2005-02-04 Security Internal Opera Presto 1.0 Linear B
Opera 7.54ud1 2004-12-10 Security Internal Opera Presto 1.0 Linear B
Opera 7.54 2004-08-05 Security Internal Opera Presto 1.0 Linear B
Opera 7.53 2004-07-20 Security Internal Opera Presto 1.0 Linear B
Opera 7.52 2004-07-07 Security Internal Opera Presto 1.0 Linear B
Opera 7.51 2004-06-03 Security Internal Opera Presto 1.0 Linear B
Opera 7.50 2004-05-12 Final Internal Opera Presto 1.0 Linear B
New features:
  • Improved Quick internal cross-platform GUI toolkit
  • Integrated IRC (Internet Relay Chat) client
  • RSS newsfeeds
  • Full-text indexing of e-mail messages
Opera 7.50b1 2004-04-22 Beta Internal Opera Presto 1.0 Linear B
Opera 7.30 2004-03-23 Special Internal Opera Presto 1.0 Linear B
New features:
  • 1st release as part of IBM Websphere Multimodal extension toolkit
  • Initial Voice capability added
Opera 7.23 2003-11-22 Security Internal Opera Presto 1.0 Linear B
Opera 7.22 2003-11-12 Security Internal Opera Presto 1.0 Linear B
Opera 7.21 2003-10-14 Security Internal Opera Presto 1.0 Linear B
Opera 7.20 2003-09-23 Final Internal Opera Presto 1.0 Linear B
New features:
  • Notes
  • DOM CSS
  • DOM HTML
  • Aspect ratio (CSS3 media queries)
  • BiDi language display
  • Horizontal panning
  • Default accept header is application/xmlinstead of application/xhtml+xml
  • Synchronized animations
  • JavaScript options in Multimedia preferences
Opera 7.20b 2003-08-28 Beta Internal Opera Presto 1.0 Linear B
Opera 7.11 2003-05-09 Security Internal Opera Presto 1.0 Linear B
Opera 7.10 2003-04-11 Final Internal Opera Presto 1.0 Linear B
New features:
  • Notes
  • Cookie manager
  • Wand manager
  • Rewind
  • Support for multiple users on Windows
Opera 7.03 2003-03-13 Security Internal Opera Presto 1.0 Linear B
Opera 7.02 2003-02-26 Security Internal Opera Presto 1.0 Linear B
Opera 7.01
"Bork" 		2003-02-14 Special Internal Opera Presto 1.0 Linear B
Opera 7.01 2003-02-05 Security Internal Opera Presto 1.0 Linear B
Opera 7.00 2003-01-28 Final Internal Opera Presto 1.0 Linear B
New features:
  • Opera Presto rendering engine
  • Linear B JavaScript engine
  • Quick: cross-platform GUI toolkit
  • Drag-and-Drop of Tabs
  • Fast Forward
  • Spatial navigation
  • M2 e-mail and news client
  • Page/document reflow support
  • DOM Level 2 support
  • Complete WML 1.3 and 2.0 support
  • Complete ECMAScript support
  • Panels (formerly Hotlist panels)
Opera 7.00b2 2002-12-18 Beta Internal Opera Presto 1.0 Linear B
Opera 7.00b1v2 2002-11-22 Beta Internal Opera Presto 1.0 Linear B
Opera 7.00b1 2002-11-13 Beta Internal Opera Presto 1.0 Linear B

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Opera 6 series

Historical note
"Elektra" was originally used as a codename for the 4.0 release, but was later used to refer to the rendering capabilities (the "engine") from version 3.5 through version 6. The Opera 7 series and those that followed began the formal labeling of the rendering engine, in this case "Opera Presto".
Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 6.10 2002-10-31 FreeBSD version Internal Elektra Linear A
New features:
  • 1st FreeBSD version
Opera 6.06 2002-03-18 Security Internal Elektra Linear A
Opera 6.05 2002-08-13 Security Internal Elektra Linear A
Opera 6.04 2002-06-01 Security Internal Elektra Linear A
Opera 6.03 2002-05-27 Security Internal Elektra Linear A
Opera 6.02 2002-05-15 Security Internal Elektra Linear A
Opera 6.01 2002-02-12 Security Internal Elektra Linear A
Opera 6.00 2001-12-18 Final Internal Elektra Linear A
New features:
  • Skin choices enabled
  • Start-up dialog
  • SDI/MDI mode
  • Unicode character standard
  • Hotclick
  • Hotlist panels
  • Personal bar
  • PNG alpha transparency
  • Internationalized domain names
  • Small-screen rendering
  • Further improved pop-up blocking control
Opera 6.00b 2001-11-13 Beta Internal Elektra Linear A

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Opera 5 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 5.12 2001-06-27 Security Internal Elektra Linear A
Opera 5.11 2001-05-05 Security Internal Elektra Linear A
Opera 5.10 2001-04-10 Final Internal Elektra Linear A
New features:
  • Mouse gestures
  • Integrated search
  • In-line progress indicator
  • Mouse button reversing
  • Image choices enabled for toolbar background
  • XHTML namespace support
  • <noscript> HTML compliance
  • Deprecated S-element support
  • CSS system colors support
  • Improved pop-up blocking
Opera 5.02 2001-01-16 Security Internal Elektra Linear A
Opera 5.01 2000-12-18 Security Internal Elektra Linear A
Opera 5.00 2000-12-06 Final Internal Elektra Linear A
New features:
  • 1st free download version (ad sponsored)
  • Search field on toolbar
  • Integrated ICQ chat client (removed in later versions)

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Opera 4 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 4.02 2000-08-04 Security Internal Elektra Linear A
Opera 4.01 2000-07-14 Security Internal Elektra Linear A
Opera 4.00 2000-06-28 Final Internal Elektra Linear A
New features:
  • Tabbed browsing: TDI (Tabbed Document Interface)
  • Opera Show (support for @mediarules)
  • Linear A JavaScript engine
  • Print preview
  • Kiosk mode
  • XML 1.0 support
  • Dynamic HTML (DHTML) support
  • Clear private data
  • E-mail and news client
  • 128 bit encryption
  • SSL 2 and 3, CSS1, CSS2, XML, HTML 4.0, HTTP 1.1, ECMAScript and JavaScript 1.3 support
  • Supports @mediarules
  • Experimental support for WML (surf WAP sites directly from the desktop)
  • Sun Java Plug-in 1.3 support
Opera 4.00b6 2000-06-27 Beta Internal Elektra Linear A
Opera 4.00b5 2000-06-07 Beta Internal Elektra Linear A
Opera 4.00b4 2000-05-17 Beta Internal Elektra Linear A
Opera 4.00b3 2000-04-21 Beta Internal Elektra Linear A
Opera 4.00b2 2000-04-03 Beta Internal Elektra Linear A
Opera 4.00tp 2000-03-20 Tech Preview Internal Elektra Linear A

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Opera 3 series

Historical note:
Opera introduced a beta version release for BeOS on July 29, 1999. It was built for the BeOS operating system which had the ability to run in a multiple CPU environment.
Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 3.65 BeOS beta 1999-07-29 Beta
(first BeOS version) 		Internal Elektra Unnamed
Opera 3.62 2000-03-10 Security Internal Elektra Unnamed
Opera 3.62b 2000-01-25 Beta Internal Elektra Unnamed
Opera 3.61 1999-12-21 Security Internal Elektra Unnamed
Opera 3.60 1999-05-06 Final Internal Elektra Unnamed
New features:
  • New optional user interface button sets (2)
  • Improved CSS, HTML, JavaScript, and faster JPEG and GIF image rendering
Opera 3.51 1998-12-22 Security Internal Elektra Unnamed
Opera 3.50 1998-11-18 Final Internal Elektra Unnamed
New features:
  • Elektra rendering engine
  • File Upload
  • Integrated download/transfer manager
  • CSS 1 support
  • TLS 1.0 support
  • UserCSS
  • Java functionality through plug-ins
  • Offline mode
Opera 3.21 1998-04-01 Security Internal Unnamed Unnamed
Opera 3.10 1998-02-01 Security Internal Unnamed Unnamed
Opera 3.00 1997-12-01 Final Internal Unnamed Unnamed
New features:
  • JavaScript
  • HTML 2.0 full compliance
  • HTML 3.3 partial compliance
  • SSL
  • Plug-in capabilites
  • Nicknames (aliases for search pages/bookmarks)
  • Pop-up blocking
  • Button set choices made available
  • Ctrl+Shift clicking on links
Opera 3.00b 1997-09-15 Beta Internal Unnamed Unnamed

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Opera 2 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 2.12 1997-02-12 Final Internal Unnamed None
New features:
  • Block referrer information
  • Adjust actions on specific MIME types
  • Empty cache on exit
  • Disable images, animation, or frames
  • Launch sounds at:
    • startup
    • on page load
    • on exit
  • Multiple graphics formats support:
    • .JPG
    • .GIF
    • .XBM
    • .BMP
    • .AVI video
    • Animated .GIF
    • MPEG video
Opera 2.10 1996-12-09 Final Internal Unnamed None
1st public release
New features:
  • Zoom: proportional full page scaling from 20% to 1000%
  • Sessions: save, open, insert and restore sessions
  • Frames capabilites
  • New keyboard shortcuts
  • Loads local and external web pages
  • Support for HTML 3.0
Opera 2.10b3 1996-11 Beta Internal Unnamed None
Opera 2.10b2 1996-10 Beta Internal Unnamed None
Opera 2.10b1 1996-09 Beta Internal Unnamed None
Opera 2.00 1996-04-22 Final Internal Unnamed None
Publically announced by Jon von Tetzschner
New features:
  • NNTP client
  • SMTP client
Opera 2.00cd 1996-04-18 Demo CD Internal Unnamed None

Opera 1 series

Version
number 		Release
date 		Release
type 		Project
name 		Rendering
engine 		JavaScript
engine
Opera 1.00 1995-04-10 through 1995-04-14
  • Demonstrated publicly at WWW 1995 conference
  • First Beta: late 1994
  • Work started: April 1994
 Limited/internal Internal Unnamed None
New features:
  • MDI Interface
  • Keyboard interface
  • Sessions
  • RAM Cache
  • Image control per window (on/off/loaded)
  • Multiple setups (simple, advanced, etc.)
  • Multiple home pages: set a home page per window (removed in later versions)
  • Multi-item Hot List: allows reading of multiple documents simultaneously

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