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{{Infobox Software
Wat
| name = Opera
| logo = <div style="padding-right:20px">[[Image:Opera logo.png|94px]]</div>
| screenshot = [[Image:Opera 9.5.png|250px]] <!-- Do not replace this with a screenshot of Opera on Windows because doing so introduces excessive non-free content -->
| caption = Opera 9.5 running on [[Ubuntu (operating system)|Ubuntu]] Linux
| developer = [[Opera Software]] [[Allmennaksjeselskap|ASA]]
| released = {{release year|1996}}
| frequently_updated = Yes <!-- Release version update? Don't edit this page, just click on the version number! -->
| operating system = [[Cross-platform]]
| size = 5.4 MB <small>([[Microsoft Windows|Windows]]) English (US)</small><br>7.1 MB <small>([[Microsoft Windows|Windows]]) International</small><br>7.9 MB <small>([[Mac OS X]]) Intel</small><br>13.5 MB <small>([[Mac OS X]]) Universal</small><br>6.9 MB <small>([[Linux]]) Shared QT package</small><br>8.7 MB <small>([[Linux]]) Static QT package</small><br><small>(all archived)</small>
| language = Various languages<ref>{{cite web |url=http://www.opera.com/download/languagefiles/ |title=Opera for Windows — language files |publisher=[[Opera Software]] |accessdate=2008-04-02}}</ref>
| genre = [[Internet suite]]
| license = [[Proprietary software|Proprietary]]
| website = [http://www.opera.com/ www.opera.com]
}}
'''Opera''' is a [[web browser]] and [[Internet suite]] developed by the [[Opera Software]] company. Opera handles common Internet-related tasks such as displaying web sites, sending and receiving [[e-mail]] messages, managing contacts, [[IRC]] [[online chat]]ting, downloading files via [[BitTorrent (protocol)|BitTorrent]], and reading [[web feed]]s. Opera is offered free of charge for [[personal computer]]s and [[mobile phone]]s, but for other devices it is not free.

Features of Opera include [[tabbed browsing]], [[page zooming]], [[mouse gestures]], and an integrated [[download manager]]. Its security features include built-in [[phishing]] and [[malware]] protection, strong encryption when browsing secure web sites, and the ability to easily delete private data such as [[HTTP cookie|cookies]] and browsing history by simply clicking a button.

Opera runs on a variety of personal computer [[operating system]]s, including [[Microsoft Windows]], [[Mac OS X|Mac OS&nbsp;X]], [[Linux]], [[FreeBSD]], and [[Solaris (operating system)|Solaris]].<ref>{{cite web
|url=http://www.opera.com/download/index.dml?custom=yes
|title=Download Opera Web Browser
|publisher=[[Opera Software]]
|accessdate=2007-12-03
}}</ref> Though evaluations of Opera have been largely positive, Opera has captured only a fraction of the worldwide personal computer browser market. It is currently the fourth most widely used web browser for personal computers, behind [[Internet Explorer]], [[Firefox]], and [[Safari (web browser)|Safari]].

Opera has a stronger market share, however, on mobile devices such as [[mobile phone]]s, [[smartphone]]s, and [[personal digital assistant]]s. Editions of Opera are available for devices using the [[Symbian]] and [[Windows Mobile]] operating systems, as well as [[Java ME]]-enabled devices. In fact, approximately 40 million mobile phones have shipped with Opera pre-installed. Furthermore, Opera is the only commercial web browser available for the Nintendo [[Nintendo DS|DS]] and [[Wii]] gaming systems. Some television [[set-top box]]es use Opera as well, and [[Adobe Systems|Adobe]] licensed Opera technology for use in the [[Adobe Creative Suite]].

==History==
{{main|History of the Opera web browser}}
{{seealso|Opera Mobile#History|Opera Mini#History|Nintendo DS Browser#Launch|Internet Channel#History|Opera Software#History}}
[[Image:Håkon Wium Lie.jpg|thumb|right|upright|[[Håkon Wium Lie]], [[chief technical officer]] of the [[Opera Software]] company and creator of the [[CSS]] web standard]]

Opera began in 1994 as a research project at [[Telenor]], the largest Norwegian telecommunications company. In 1995, it branched out into a separate company named [[Opera Software]] [[Allmennaksjeselskap|ASA]].<ref name="Milestones">{{cite web
|url=http://www.opera.com/company/about/milestones/
|title=Milestones
|publisher=[[Opera Software]]
|accessdate=2007-10-30
}}</ref> Opera was first released publicly with version 2.0 in 1996,<ref name="Affiliated">{{cite web
|url=http://www.foxkeh.com/downloads/history/history-original.pdf
|format=[[PDF]]
|title=Affiliated Organization of Firefox and Mozilla
|publisher=Mozilla Japan
|year=2006
|accessdate=2007-10-24
}}</ref> which only ran on [[Microsoft Windows]].<ref>{{cite web
|url=http://www.opera.com/company/about/
|title=About Opera
|publisher=[[Opera Software]]
|accessdate=2007-10-24
}}</ref> In an attempt to capitalize on the emerging market for Internet-connected handheld devices, a project to port Opera to mobile device [[Platform (computing)|platforms]] was started in 1998.<ref name="Milestones"/> Opera 4.0, released in 2000,<ref name="Affiliated"/> included a new cross-platform core that facilitated creation of editions of Opera for multiple [[operating system]]s and [[Platform (computing)|platform]]s.<ref>{{cite web
|url=http://www.markschenk.com/opera/history.html
|title=Opera browser version history
|last=Schenk
|first=Mark
|date=2007-01-06
|accessdate=2007-10-24
}}</ref>

Up to this point, Opera was [[trialware]] and had to be purchased after the trial period ended. But version 5.0 (released in 2000) saw the end of this requirement. Instead, Opera became [[Adware|ad-sponsored]], displaying advertisements to users who had not paid for it.<ref>{{cite news
|url=http://www.theregister.co.uk/2000/12/06/opera_browser_goes_free/
|title=Opera browser goes free with version 5.0 launch
|last=Lettice
|first=John
|publisher=[[The Register]]
|date=2000-12-06
|accessdate=2007-10-11
}}</ref> Later versions of Opera gave the user the choice of seeing [[banner ad]]s or targeted text advertisements from [[Google]]. With version 8.5 (released in 2005) the advertisements were removed entirely and primary financial support for the browser came through revenue from Google (which is by contract Opera's default search engine).<ref name="Baker">{{cite news
|url=http://www.searchenginejournal.com/opera-goes-free-with-help-from-google/2227/
|title=Opera Goes Free with Help from Google
|last=Baker
|first=Loren
|publisher=Search Engine Journal
|date=2005-09-20
|accessdate=2007-10-12
}}</ref>

Among the new features introduced in version 9.1 (released in 2006) was fraud protection using technology from [[GeoTrust]], a [[digital certificate]] provider, and [[PhishTank]], an organization that tracks known [[phishing]] web sites.<ref>{{cite web
|url=http://operawatch.com/news/2006/12/opera-91-is-out-with-fraud-protection.html
|title=Opera 9.1 is out with Fraud Protection
|last=Goldman
|first=Daniel
|work=Opera Watch
|date=2006-12-18
|accessdate=2007-10-11
}}</ref>
This feature was further improved and expanded in version 9.5, when [[GeoTrust]] was replaced with [[Netcraft]], and malware protection from [[Haute Secure]] was added.<ref>{{cite web
|url=http://my.opera.com/desktopteam/blog/2008/06/06/malware-protection
|title=Malware protection
|last=Kleinhout
|first=Huib
|work=Opera Software
|date=2008-06-06
|accessdate=2008-06-12
}}</ref>

Also in 2006, editions of Opera were made and released for Nintendo's [[Nintendo DS|DS]] and [[Wii]] gaming systems.<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/02/15/
|title=Giving gamers two windows to the Web: The Opera Browser for Nintendo DS
|publisher=[[Opera Software]]
|date=2006-02-15
|accessdate=2007-10-12
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2007/06/08/
|title=Nintendo DS Browser available to North American market
|publisher=[[Opera Software]]
|date=2007-06-08
|accessdate=2007-10-12
}}</ref><ref name="A Web Revolution">{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/05/10/
|title=A Web Revolution in the Living room: Opera partners with Nintendo to put browser on the Wii game console
|publisher=[[Opera Software]]
|date=2006-05-10
|accessdate=2007-10-12
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/12/22/
|title=Play with the Web: Opera browser now available for download on Wii
|publisher=[[Opera Software]]
|date=2006-12-22
|accessdate=2007-10-12
}}</ref> Opera for the Wii, called the [[Internet Channel]], was free to download from its release on April 12, 2007<ref name="Get to Know the Web on Wii">{{cite press release
|url=http://www.opera.com/pressreleases/en/2007/04/12/
|title=Get to Know the Web on Wii: Full Version of Wii Internet Channel Powered by Opera Available for Free Download
|publisher=[[Opera Software]]
|date=2007-04-12
|accessdate=2007-10-12
}}</ref> until June 30, 2007. After June 30, Wii users had to pay 500 [[Wii Points]] (about [[US$]]5<ref name="Wii Points Card">{{cite web
|url=http://www.amazon.com/Nintendo-Wii-Points-Card/dp/B000IMYL0U
|title=Wii Points Card
|publisher=[[Amazon.com]]
|accessdate=2007-12-03
}}</ref>) to download it.<ref name="Hayward">{{cite news
|url=http://www.1up.com/do/newsStory?cId=3160583
|title=Reminder: Wii Internet Channel Free 'til June 30
|last=Hayward
|first=Andrew
|publisher=[[Ziff Davis]]
|date=2007-06-26
|accessdate=2007-12-11
}}</ref> The [[Nintendo DS Browser]] is likewise not free; it is sold as a physical DS [[game cartridge]].<ref name="Nintendo DS Lite Browser">{{cite web
|url=http://www.amazon.com/Nintendo-DS-Lite-Browser/dp/B000OAO494/ref=pd_bbs_sr_1/102-7569560-8340930?ie=UTF8&s=videogames&qid=1192679747&sr=8-1
|title=Nintendo DS Lite Browser
|publisher=[[Amazon.com]]
|accessdate=2007-10-18
}}</ref>

==Features==
{{main|Features of the Opera web browser}}
{{seealso|Opera Mobile#Features|Opera Mini#Features|Nintendo DS Browser#Features|Internet Channel#Features}}

The [[Opera Software]] company claims that Opera is "the fastest browser on Earth."<ref>{{cite news
|url=http://news.zdnet.com/2100-9595_22-527783.html
|title='Fastest browser on earth' now free for Linux, Mac
|author=Jo
|publisher=[[ZDNet]]
|date=2001-02-01
|accessdate=2007-10-18
}}</ref> One set of third-party speed tests concluded that Opera 9.5 was indeed faster than [[Internet Explorer 7]] and prerelease versions of [[Firefox 3]] and [[Safari (web browser)|Safari]] 3.<ref>{{cite web
|url=http://nontroppo.org/timer/kestrel_tests/
|title=Performance Tests for Opera 9.5
|last=Andolina
|first=Ian
|accessdate=2008-07-29
}}</ref> However, technology website [[ZDNet]]'s speed tests showed that out of Internet Explorer 7, Safari 3, and pre-release versions of Firefox 3 and Opera 9.5, the only browser that Opera clearly outperformed was Internet Explorer.<ref>{{cite web
|url=http://www.zdnet.com.au/reviews/software/internet/soa/Browser-faceoff-IE-vs-Firefox-vs-Opera-vs-Safari/0,139023437,339289417-7,00.htm
|title=Conclusion
|last=Schmerer
|first=Kai
|work=Browser faceoff: IE vs Firefox vs Opera vs Safari
|publisher=[[ZDNet]]
|date=2008-05-29
|accessdate=2008-07-14
}}</ref>

Opera includes built-in [[tabbed browsing]], [[Pop-up ad|pop-up]] blocking, fraud protection, a [[download manager]] and [[BitTorrent (protocol)|BitTorrent]] client, a search bar, and a [[web feed]] [[aggregator]]. Opera also comes with an [[e-mail]] client called [[Opera Mail]] and an [[IRC]] [[Online chat|chat]] client built in.<ref name="Features">{{cite web
|url=http://www.opera.com/products/desktop/
|title=Opera browser: Features
|publisher=[[Opera Software]]
|accessdate=2007-10-11
}}</ref>

Opera includes a "Speed Dial" feature, which allows the user to add up to nine links to the page displayed when a new tab is opened. [[Thumbnail]]s of the linked pages are automatically generated and used for visual recognition on the Speed Dial page. Once set up, this feature allows the user to more easily navigate to the selected web pages.<ref>{{cite web
|url=http://arstechnica.com/news.ars/post/20070412-opera-releases-9-2-browser-adds-speed-dial.html
|title=Opera releases 9.2 browser, adds "Speed Dial"
|last=Reimer
|first=Jeremy
|publisher=ars technia
|date=2007-04-12
|accessdate=2007-10-25
}}</ref>

Opera supports "Opera Widgets", small web applications that start from within Opera. Alongside Widgets, "User JavaScript" may be used to add custom JavaScript to web pages, including [[Greasemonkey]] scripts. Opera is extensible in a third way via [[plug-in]]s, relatively small programs that add specific functions to the browser.<ref>{{cite web
|url=http://www.opera.com/docs/plugins/
|title=Plug-ins and Opera
|publisher=[[Opera Software]]
|accessdate=2007-10-11
}}</ref> However, Opera limits what plug-ins can do and does not support full-fledged third-party extensions to the browser. Opera does this as a [[quality assurance]] measure, so that third-party extensions cannot introduce bugs.<ref>{{cite web
|url=http://www.opera.com/press/faq/#tech14
|title=Why doesn't Opera support extensions?
|work=Opera Press FAQ
|publisher=[[Opera Software]]
|accessdate=2007-10-11
}}</ref>

===Usability and accessibility===
{| style="background-color:#F9F9F9; border:1px solid #AAAAAA; float:right; margin:0.5em 0px 0.8em 1.4em; width:50ex"
! colspan="3" style="font-size:132%; padding-bottom:1ex" | Sample mouse gestures in Opera
|-
| [[Image:Opera back mouse gesture.svg]] || '''Back:''' hold down right mouse button, move mouse left, and release '''or''' hold the right button down and click the left button
|-
| [[Image:Opera forward mouse gesture.svg]]
| style="padding-right:1em" | '''Forward:''' hold down right mouse button, move mouse right, and release '''or''' hold the left button down and click the right button
|-
| [[Image:Opera new tab mouse gesture.svg]] || '''New tab:''' hold down right mouse button, move mouse down, and release. Clicking a link with the middle mouse button produces a similar effect, but the new tab is opened in the background instead of becoming the active tab.
|}

Opera was designed with a commitment to [[computer accessibility]] for users who have visual or mobility impairments. As a [[multimodal browser]], it also caters to a wide variety of personal preferences in the user interface.

It is possible to control nearly every aspect of the browser using only the [[Computer keyboard|keyboard]],<ref>{{cite web
|url=http://www.opera.com/support/tutorials/nomouse/
|title=Use Opera without a Mouse
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref> and the default [[keyboard shortcut]]s can be modified to suit the user.<ref>{{cite web
|url=http://operalover.tntluoma.com/day_16_sessions
|title=Day 16: Sessions
|work=30 Days to becoming an Opera8 Lover
|date=2005-05-25
|accessdate=2007-10-25
}}</ref><ref>{{cite web
|url=http://my.opera.com/csant/blog/2007/06/11/emacs-keyboard-bindings-2
|title=emacs keyboard bindings - 2
|last=Santambrogio
|first=Claudio
|work=csant/log
|date=2007-06-11
|accessdate=2007-10-25
}}</ref> Opera also includes support for [[mouse gesture]]s,<ref>{{cite news
|url=http://news.cnet.com/2100-1023-960408.html
|title=Building a better computer mouse
|first=Evan
|last=Hansen
|date=2002-10-02
|accessdate=2007-10-18
}}</ref> patterns of mouse movement that trigger browser actions such as "back" or "refresh".<ref>{{cite web
|url=http://www.opera.com/products/desktop/mouse/
|title=Mouse Gestures in Opera
|publisher=[[Opera Software]]
|accessdate=2007-10-25
}}</ref>

[[Page zooming]] allows text, [[image]]s and other content such as [[Macromedia Flash]], [[Java platform|Java]] and [[Scalable Vector Graphics]] to be increased or decreased in size (20% to 1000%) to help those with impaired vision. The user may also specify the fonts and colors for web pages, and even override the page's [[CSS]] styling as well. This can be useful for making sites appear in [[high contrast]] or in more readable fonts.<ref>{{cite web
|url=http://www.opera.com/products/desktop/access/visual/
|title=Visual Impairments and Opera
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref>

[[Voice control]], co-developed with [[IBM]], allows control of the browser without the use of a keyboard or mouse.<ref>{{cite web
|url=http://www.extremetech.com/article2/0,3973,414251,00.asp
|title=IBM, Opera To Develop "Multimode" Browser
|publisher=ExtremeTech
|date=2002-07-24
|accessdate=2007-10-12
}}</ref><ref>{{cite web
|url=http://www.webstandards.org/2004/03/26/opera-ibm-voice/
|title=Opera, IBM voice
|author=Koltz, Holly Marie
|date=2004-03-26
|accessdate=2007-10-12
}}</ref> It can also read aloud pages and marked text.<ref name="Features"/>

===Privacy and security===
Opera has several security features visible to the end user. One is the option to delete private data, such as [[HTTP cookie|cookie]]s, the browsing history, and the [[cache]], with the click of a button. This lets users erase personal data after browsing from a shared computer.<ref>{{cite web
|url=http://operalover.tntluoma.com/delete_private_data
|title=Delete Private Data
|work=30 Days to becoming an Opera8 Lover
|date=2005-09-23
|accessdate=2007-10-25
}}</ref>

When visiting a secure web site, Opera encrypts data using either [[Secure Sockets Layer|SSL]]&nbsp;3 or [[Transport Layer Security|TLS]],<ref>{{cite web
|url=http://labs.opera.com/news/2006/05/16/
|title=What's new in the SSL/TLS engine of Opera 9?
|last=Pettersen
|first=Yngve
|date=2006-05-16
|accessdate=2007-10-25
}}</ref><ref>{{cite web
|url=http://www.agnitum.com/news/securityinsight/february2006issue.php
|title=Security in Opera Browser: A Brief Glance
|publisher=agnitum
|accessdate=2007-10-25
}}</ref> both of which are highly secure encryption protocols. It then adds information about the site's security to the [[address bar]]. It will also check the web site that is being visited against blacklists of [[phishing]] and [[malware]], and warn if it matches any of these lists. This behavior is enabled by default, but the user may opt to not make such checks automatically. If this check is disabled, the user can still check sites individually by opening a Page Info dialog.<ref>{{cite web
|url=http://www.opera.com/docs/fraudprotection/
|title=Tutorial: Fraud protection
|publisher=[[Opera Software]]
|accessdate=2008-06-12
}}</ref>

The user can protect every saved password stored in Opera with a master password. This way [[malware]] and [[keyloggers]] cannot decrypt those passwords unless the master password is known.
To catch security flaws and other [[Software bug|bug]]s before they are exploited or become a serious problem, the [[Opera Software]] company maintains a public [[web form]] where users can submit bug reports.<ref>{{cite web
|url=http://www.opera.com/support/bugs/
|title=Reporting Bugs
|publisher=[[Opera Software]]
|accessdate=2007-10-25
}}</ref> According to [[Secunia]], a computer security service provider, 16 security vulnerabilities have been publicly identified in Opera 9.x as of July 2008, zero of which remain [[Patch (computing)|unpatched]].<ref>{{cite web
|url=http://secunia.com/product/10615/s
|title=Vulnerability Report: Opera 9.x
|publisher=[[Secunia]]
|accessdate=2008-08-01
}}</ref> This stands in contrast to [[Firefox]] 3.x (zero out of three known vulnerabilities unpatched),<ref>{{cite web
|url=http://secunia.com/product/19089/
|title=Vulnerability Report: Mozilla Firefox 3.x
|publisher=[[Secunia]]
|accessdate=2008-08-01
}}</ref> [[Internet Explorer 7|Internet Explorer 7.x]] (10 out of 29 known vulnerabilities unpatched),<ref>{{cite web
|url=http://secunia.com/product/12366/
|title=Vulnerability Report: Microsoft Internet Explorer 7.x
|publisher=[[Secunia]]
|accessdate=2008-08-01
}}</ref> and [[Safari (web browser)|Safari]] 3.x (two out of five known vulnerabilities unpatched).<ref>{{cite web
|url=http://secunia.com/product/17989/
|title=Vulnerability Report: Safari 3.x
|publisher=[[Secunia]]
|accessdate=2008-08-01
}}</ref>

However, in January 2007, [[Asa Dotzler]] of the competing [[Mozilla Corporation]] criticized the [[Opera Software]] company for downplaying information about known security vulnerabilities in Opera. Dotzler claimed that users were not clearly informed of security vulnerabilities present in older versions of Opera, and thus they would not realize that they needed to upgrade to the latest version or risk being exploited.<ref>{{cite news
|url=http://www.internetnews.com/dev-news/article.php/3653031
|title=Mozilla Takes Aim at Opera Security
|author=Kerner, Sean Michael
|publisher=internetnews.com
|date=2007-01-09
|accessdate=2007-10-25
}}</ref>

===Standards support===
Opera was one of the first browsers to support [[Cascading Style Sheets]] (CSS), now a major building block of web design.<ref>{{cite web
|url=http://meyerweb.com/eric/articles/webrev/199906.html
|title=CSS: If not now, when?
|first=Eric
|last=Meyer
|authorlink=Eric Meyer
|month=June
|year=1999
|accessdate=2007-10-11
}}</ref> Today, Opera supports many [[web standards]], including CSS 2.1, [[HTML]] 4.01, [[XHTML]] 1.1, [[XHTML Basic]], [[XHTML Mobile Profile]], [[XHTML+Voice]], [[WML]] 2.0, [[XSLT]], [[XPath]], [[XSL-FO]], [[ECMAScript]] 3 ([[JavaScript]]), [[Document Object Model|DOM]] 2, [[XMLHttpRequest]], [[HTTP]] 1.1, [[Unicode]], [[SVG]] 1.1 Basic, SVG 1.1 Tiny, [[GIF89a]], [[JPEG]], and full support for [[Portable Network Graphics|PNG]], including [[alpha transparency]].<ref>{{cite web
|url=http://www.opera.com/docs/specs/
|title=Web Specifications Supported in Opera 9
|publisher=[[Opera Software]]
|accessdate=2007-10-11
}}</ref>

Since version 9, Opera also passes the [[Acid2]] test, a test of whether or not a browser properly supports certain web standards. Opera was the fourth web browser to pass the test and the first [[Microsoft Windows|Windows]] browser to pass the test.<ref>{{cite web
|url=http://webstandards.raquedan.com/?p=44
|title=Opera now passes the Acid2 Test
|author=Raquedan, Kreisler C.
|work=Standard Web Standards
|date=2006-03-13
|accessdate=2007-10-25
}}</ref>

Active efforts are also underway to pass the [[Acid3]] test. The latest stable release, version 9.6, scores an 85/100, and a [http://labs.opera.com/news/2008/03/28/ developmental build] scores 100/100, although it still fails the performance aspect of the test.

==Other editions==
Aside from the main edition of Opera for [[personal computer]]s, editions of Opera are available for a variety of devices. All are based on the same core,<ref>{{cite web
|url=http://nontroppo.org/timer/kestrel_tests/#conclusion
|title=Performance Tests for Opera 9.5: Conclusions
|accessdate=2007-11-10
}}</ref> but there is some variation in the features offered and the design of the user interface.

===Smartphones and PDAs===
[[Image:SE P910i.jpg|thumb|right|140px|Opera Mobile running on the [[Sony Ericsson P910]]i Smartphone]]
{{main|Opera Mobile}}

[[Opera Mobile]] is an edition of Opera designed for [[smartphone]]s and [[personal digital assistant]]s (PDAs). The first version of Opera Mobile was released in 2000 for the [[Psion Series 7]] and [[netBook]], with a port to the [[Windows Mobile]] platform coming in 2004.<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2000/03/20000331.dml
|title=mCommerce Now a Reality on Psion Platform
|publisher=[[Opera Software]]
|date=2000-04-03
|accessdate=2007-12-04
}}</ref><ref>{{cite web
|url=http://jp.opera.com/products/mobile/brochures/OperaMobileTimeline.pdf
|format=[[PDF]]
|title=Opera Mobile Timeline
|publisher=[[Opera Software]]
|year=2006
|accessdate=2007-12-04
}}</ref> Today, Opera Mobile is available for a variety of devices that run the [[Windows Mobile]], [[S60 platform|S60]], or [[UIQ]] [[operating system]]s.<ref name = "Products featuring the Opera Mobile Browser"/>

Users may try Opera Mobile free for 30 days, but beyond that it costs [[US$]]24.<ref>{{cite web
|url=http://www.opera.com/buy/?show=mobile
|title=Buy Opera
|publisher=[[Opera Software]]
|accessdate=2008-01-03
}}</ref> Devices that use the [[UIQ]]&nbsp;3 operating system, such as the [[Sony Ericsson P990]] and [[Motorola RIZR Z8]], come pre-installed with Opera Mobile, the price of Opera Mobile being included in the price of the phone.<ref name="Products featuring the Opera Mobile Browser">{{cite web
|url=http://www.opera.com/products/mobile/products/
|title=Products featuring the Opera Mobile Browser
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref>

One of Opera Mobile's major features is the ability to dynamically reformat [[web page]]s to better fit the handheld's [[Computer display|display]] using Small-Scale Rendering technology.<ref>{{cite web
|url=http://www.opera.com/products/mobile/smallscreen/
|title=Opera's Small-Screen Rendering
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref> Alternatively, the user may use [[page zooming]] for a closer or broader look.<ref name="Opera for Symbian S60">{{cite web
|url=http://www.opera.com/products/mobile/products/s60/
|title=Opera for Symbian S60
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref> However, like previous versions of Opera for [[personal computer]]s, Opera Mobile's [[user interface]] has come under fire for being difficult to use or customize.<ref>{{cite web
|url=http://www.pocketpcmag.com/cms/index.php?q=blogs/3/prelude_to_the_opera_mobile_vs_netfront
|title=Post details: Prelude to the Opera Mobile vs NetFront article - profound differences between the two new Web browsers
|last=Ruotsalainen
|first=Werner
|publisher=Smartphone & Pocket PC Magazine
|date=2006-06-02
|accessdate=2007-11-14
}}</ref><ref>{{cite web
|url=http://www.ivankuznetsov.com/2006/09/opera-mobile-vs.html
|title=Opera Mobile vs. Nokia S60 browser - new browser war?
|last=Kuznetsov
|first=Ivan
|date=2006-09-02
|accessdate=2007-11-14
}}</ref>

===Mobile phones===
[[Image:Opera mini.png|thumb|right|300px|When a user browses the web using Opera Mini, the request is sent via the [[General Packet Radio Service]] (GPRS) to one of the [[Opera Software]] company's servers, and that server retrieves the web page, processes it, compresses it, and sends it back to the user's mobile phone.]]
{{main|Opera Mini}}

[[Opera Mini]], offered free of charge, is designed primarily for [[mobile phone]]s, but also for [[smartphone]]s and [[personal digital assistant]]s. It uses the [[Java ME]] platform and consequently requires that the mobile device be capable of running Java ME applications. The browser began as a pilot project in 2005.<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2005/08/10/
|title=Have WAP but want WEB? Introducing Opera Mini for mobile phones
|publisher=[[Opera Software]]
|date=2005-08-10
|accessdate=2007-12-05
}}</ref> After limited releases in [[Europe]],<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2005/10/20/
|title=Mobile comfort in the cold: Opera Mini beta now available free in the Nordics
|publisher=[[Opera Software]]
|date=2005-11-10
|accessdate=2008-01-02
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2005/11/10/
|title=The full Internet for all mobile phones: Opera Mini launched in Germany
|publisher=[[Opera Software]]
|date=2005-11-10
|accessdate=2008-01-02
}}</ref> it was officially launched worldwide on January 24, 2006.<ref>{{cite news
|url=http://www.pcworld.com/article/id,124473-page,1/article.html
|title=Opera Officially Launches Mini Browser
|last=Gohring
|first=Nancy
|publisher=[[PC World (magazine)|PC World]]
|date=2006-01-24
|accessdate=2007-12-05
}}</ref>

Opera Mini requests [[web page]]s through the [[Opera Software]] company's servers, which process and compress them before relaying the pages back to the mobile phone.<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2005/08/10/
|title=Have WAP but want WEB? Introducing Opera Mini for mobile phones
|publisher=[[Opera Software]]
|date=2005-08-10
|accessdate=2007-10-18
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/04/06/
|title=Operators making money on Opera Mini: Two million users surf 4 million Web pages every day
|publisher=[[Opera Software]]
|date=2006-04-06
|accessdate=2007-10-18
}}</ref> This compression process makes transfer time about two to three times faster<ref>{{cite web
|url=http://www.operamini.com/features/
|title=Opera Mini Features
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref> and the pre-processing smooths compatibility with web pages not designed for mobile phones.<ref>{{cite news
|url=http://news.digitaltrends.com/news-article/9372/opera-mini-officially-brings-web-to-mobiles
|title=Opera Mini Officially Brings Web to Mobiles
|last=Duncan
|first=Geoff
|publisher=Digital Trends News
|date=2006-01-24
|accessdate=2007-10-18
}}</ref>

===Nintendo DS===
[[Image:DSOnWhite.jpg|thumb|right|The [[Nintendo DS]]]]
{{main|Nintendo DS Browser}}

The [[Nintendo DS Browser]] is an edition of Opera for the [[Nintendo DS]] handheld gaming system. The Nintendo DS Browser was released in Japan July 24, 2006,<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/07/24/
|title=Surf in Bed: Nintendo DS Browser hits Japan
|publisher=[[Opera Software]]
|date=2006-07-24
|accessdate=2007-10-18
}}</ref> in Europe October 6, 2006,<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/10/06/
|title=Nintendo DS Browser launches across Europe today
|publisher=[[Opera Software]]
|date=2006-10-06
|accessdate=2007-10-18
}}</ref> and in North America June 4, 2007.<ref>{{cite news
|url=http://www.gamespot.com/pages/news/story.php?sid=6170135&part=rss&tag=gs_news&subj=6170135
|title=Original DS browser available online only
|last=Sinclair
|first=Brendan
|publisher=[[GameSpot]]
|date=2007-05-04
|accessdate=2007-10-18
}}</ref> It is sold as a physical [[game cartridge]] for [[US$]]30.<ref name="Nintendo DS Lite Browser"/>

The Nintendo DS Browser includes the same Small-Scale Rendering and [[page zooming]] technology present in [[Opera Mobile]].<ref>{{cite web
|url=http://www.opera.com/products/devices/nintendo/ds/features/
|title=Opera for Nintendo - Features
|publisher=[[Opera Software]]
|accessdate=2007-10-18
}}</ref><ref name="Opera for Symbian S60"/> It also includes [[handwriting recognition]] software and an [[on-screen keyboard]] to enable user input. Additionally, [[Nintendo]] partnered with [[Astaro]] Internet Security to provide [[web filtering]] for the Nintendo DS Browser. The technology is simply a professionally maintained [[proxy server]] that blocks web sites related to pornography, discrimination, [[Hacker (computer security)|security hacking]], [[software piracy]], violence, gambling, illegal drugs, alcohol, tobacco, [[Dating (activity)|dating]], weapons, abortion, and other objectionable content.<ref>{{cite web
|url=http://www.astaro.com/ds-content-filter/
|title=Astaro Parental Control for the Nintendo DS Browser
|publisher=[[Astaro]]
|accessdate=2007-12-01
}}</ref> Users can configure the Nintendo DS Browser to receive web pages through this proxy server, and this setting can be password-protected (by a parent, for example) to prevent circumvention.<ref>{{cite web
|url=http://www.nintendo.com/consumer/systems/dslite/browser.jsp#contentFilter
|title=Nintendo DS Browser: Content Filtering (proxy server)
|work=Customer Service
|publisher=[[Nintendo]]
|accessdate=2007-11-10
}}</ref>

In August 2007, the Nintendo DS Browser was quietly discontinued in North America,<ref>{{cite news
|url=http://www.thetanooki.com/2007/08/27/nintendo-ds-browser-being-discontinued-in-north-america/
|title=Nintendo DS Browser being discontinued in North America
|last=Ponte
|first=Christian
|publisher=The Tanooki
|date=2007-08-27
|accessdate=2008-03-10
}}</ref><ref name="Nintendo DS Lite Browser"/> although it is still available from Nintendo's online store.<ref>{{cite web
|url=http://store.nintendo.com/webapp/wcs/stores/servlet/ProductDisplay?productId=129204&currency=USD&catalogId=10001&tranId=0&lastAction=setCurr&storeId=10001&languageId=-1&categoryId=58694&ddkey=http:SetCurrencyPreference
|title=Nintendo DS Browser (Original Style Nintendo DS)
|publisher=[[Nintendo]]
|accessdate=2008-05-04
}}</ref>

===Wii===
[[Image:Wii Wiimotew.jpg|thumb|right|The Nintendo [[Wii]]]]
{{main|Internet Channel}}

On May 10, 2006, the [[Opera Software]] company announced that it was partnering with Nintendo to provide a web browser for Nintendo's [[Wii]] gaming console.<ref name="A Web Revolution"/><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/12/22/
|title=Play with the Web: Opera browser now available for download on Wii
|publisher=[[Opera Software]]
|date=2006-12-22
|accessdate=2007-10-12
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2006/02/15/
|title=Giving gamers two windows to the Web: The Opera Browser for Nintendo DS
|publisher=[[Opera Software]]
|date=2006-02-15
|accessdate=2007-10-12
}}</ref><ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2007/06/08/
|title=Nintendo DS Browser available to North American market
|publisher=[[Opera Software]]
|date=2007-06-08
|accessdate=2007-10-12
}}</ref> Opera for the Wii, called the [[Internet Channel]], was free to download from its release on April 12, 2007<ref name="Get to Know the Web on Wii"/> until June 30, 2007. After June 30, Wii users had to pay 500 [[Wii Points]] ([[US$]]5<ref name="Wii Points Card"/>) to download it.<ref name="Hayward"/>

Scott Hedrick, an executive of the [[Opera Software]] company, explained that the Wii browser was designed to suit a "living room environment". In contrast to Opera's appearance on computer monitors, fonts are larger and the interface is simplified for easier use.<ref name="Temperton">{{cite web
|last=Temperton
|first=James
|url=http://www.cubed3.com/news/5329
|title=Interview: Opera's Nintendo Wii Browser
|date=2006-06-03
|accessdate=2006-06-04
|publisher=Cubed3
}}</ref> Notwithstanding the changes in design, the Wii browser supports all the same [[web standard]]s as the desktop version of Opera 9,<ref name="Temperton"/> including passing the [[Acid2]] test.<ref>{{cite web
|url=http://operawatch.com/news/2006/12/wii-browser-passes-the-acid2-test.html
|title=Wii browser passes the Acid2 test
|last=Goldman
|first=Daniel
|work=Opera Watch
|date=2006-12-22
|accessdate=2007-10-30
}}</ref>

==Market adoption==
:''Statistics reference: [[Usage share of web browsers]]''

[[As of February 2008]], usage data gives Opera's overall global share of the browser market as being about 1%<ref name="Browser Version Market Share">{{cite web
|url=http://marketshare.hitslink.com/report.aspx?qprid=0
|title=Browser Version Market Share for January, 2008
|publisher=Net Applications
|month=January
|year=2008
|accessdate=2008-02-01
}}</ref><ref>{{cite web
|url=http://virtuelvis.com/archives/2005/05/statistics-nonsense
|title=Can we please stop this statistics nonsense?
|last=Bersvendsen
|first=Arve
|month=May
|year=2005
|accessdate=2007-12-06
}}</ref> although Opera's usage share is about 18-20% in [[Russia]]<ref>{{cite web
|url=http://stat.yandex.ru/stats.xml?ReportID=2857&ProjectID=0
|title=Посещение службы Портал
|language=[[Russian language|Russian]]
|accessdate=2008-02-23
}}</ref><ref>{{cite web
|url=http://gs.spylog.ru/r/?reportId=10&categoryId=1
|title=Глобальная статистика. Броузеры
|language=[[Russian language|Russian]]
|accessdate=2008-02-23
}}</ref><ref>{{cite web
|url=http://stat.mail.ru/?stat=useragents
|title=Статистика использования браузеров
|language=[[Russian language|Russian]]
|accessdate=2008-02-23
}}</ref><ref>{{cite web
|url=http://www.liveinternet.ru/stat/ru/browsers.html?period=month
|title=отчет: количество посетителей с разными браузерами
|language=[[Russian language|Russian]]
|accessdate=2008-02-23
}}</ref> and [[Ukraine]],<ref>{{cite web
|url=http://index.bigmir.net/users?&d=0&y=1
|title=Статистика bigmir)net
|language=[[Russian language|Russian]]
|accessdate=2008-02-07
}}</ref> and 5&ndash;6% in [[Poland]], [[Latvia]], [[Lithuania]], and the [[Czech Republic]].<ref>{{cite web
|url=http://www.rankingcee.com/index.php?page=Ranks:RanksPageEN&stat=2
|title=The comparison of data concerning web browsers used by visitors (cookies) from Poland, the CR, Lithuania and Latvia (22.5.2007 - 28.5.2007)
|publisher=RankingCEE.com
|accessdate=2007-10-11
}}</ref>

Since its first release in 1996, the browser has had limited success on [[personal computer]]s. It is currently the fourth most widely used web browser for personal computers, behind [[Internet Explorer]], [[Firefox]], and [[Safari (web browser)|Safari]].<ref name="Browser Version Market Share"/> Opera has had more success in the area of mobile browsing, with product releases for a variety of [[Platform (computing)|platform]]s.<ref>{{cite web
|url=http://arstechnica.com/journals/microsoft.ars/2007/05/10/microsofts-silverlight-to-get-opera
|title=Microsoft's Silverlight to get Opera compatibility
|last=Reimer
|first=Jeremy
|publisher=ars technica
|date=2007-05-10
|accessdate=2007-10-25
}}</ref> Approximately 40 million mobile phones have shipped with a copy of Opera pre-installed.<ref>{{cite web
|url=http://www.net-security.org/article.php?id=1052
|title=Interview with Christen Krogh, Opera Software's VP of Engineering
|last=Zorz
|first=Mirko
|date=2007-08-13
|accessdate=2007-12-04
}}</ref>

In addition to [[mobile phone]]s, [[smartphone]]s, and [[personal digital assistant]]s, Opera has found a place with [[Nintendo]]'s [[Wii]] and [[Nintendo DS|DS]] gaming systems. It is used on some television [[set-top box]]es as well.<ref>{{cite web
|url=http://www.opera.com/products/devices/gallery/
|title=Opera Powered products
|publisher=[[Opera Software]]
|accessdate=2007-11-30
}}</ref> And in 2005, [[Adobe Systems|Adobe]] opted to integrate Opera's [[layout engine]], [[Presto (layout engine)|Presto]], into its [[Adobe Creative Suite]] applications. Opera technology is now found in [[Adobe GoLive]], [[Adobe Photoshop]], [[Adobe Dreamweaver]], and other components of the Adobe Creative Suite.<ref>{{cite press release
|url=http://www.opera.com/pressreleases/en/2005/04/04/
|title=Powered by Opera: Opera Integrated with Adobe Creative Suite 2
|publisher=[[Opera Software]]
|date=2005-04-04
|accessdate=2007-10-11
}}</ref><ref>{{cite web
|url=http://operawatch.com/news/2007/05/dreamweaver-uses-operas-small-screen-rendering-technology-to-preview-webpages-for-mobile-phones.html
|title=Dreamweaver uses Opera’s Small-Screen Rendering technology to preview webpages for mobile phones
|last=Goldman
|first=Daniel
|work=Opera Watch
|date=2007-05-03
|accessdate=2007-10-15
}}</ref>

==Critical reception==
{{seealso|Opera Mobile#Critical reception|Opera Mini#Critical reception|Nintendo DS Browser#Critical reception}}

Critical reception of Opera has been largely positive,<ref>{{cite web
|url=http://www.geek.com/hwswrev/software/opera/opera2.htm
|title=Software Review: Opera browser for Windows v3.62
|last=Mason
|first=Wesley
|publisher=Geek.com
|date=2000-03-16
|accessdate=2007-10-13
}}</ref><ref>{{cite web
|url=http://www.download.com/Opera/3000-2356_4-10005498.html?cdlPid=10853151
|title=Editor's review of Opera
|publisher=[[Download.com]]
|accessdate=2007-10-13
}}</ref><ref>{{cite web
|url=http://www.compukiss.com/populartopics/research_infohtm/review386.htm
|title=Opera Web Browser
|last=Berger
|first=Sandy
|publisher=CompuKiss
|date=2006-09-30
|accessdate=2007-10-13
}}</ref> although it has been criticized for website compatibility issues,<ref>{{cite web
|url=http://my.opera.com/desktopteam/blog/2007/08/31/focus-areas-during-kestrel-development
|title=Focus Areas during Kestrel Development
|last=Altman
|first=Tim
|date=2007-08-31
|accessdate=2007-10-23
}}</ref><ref>{{cite web
|url=http://weblogs.mozillazine.org/asa/archives/2007/09/opera_95_alpha.html
|title=Firefox and more
|last=Dotzler
|first=Asa
|authorlink=Asa Dotzler
|date=2007-09-04
|accessdate=2007-11-30
}}</ref> partly because many web sites do not adhere to [[web standard]]s as diligently as Opera.<ref>{{cite web
|url=http://my.opera.com/Andrew%20Gregory/blog/index.dml/tag/compatibility
|title=Posts tagged with "compatibility"
|last=Gregory
|first=Andrew
|date=2007-11-19
|accessdate=2007-11-30
}}</ref><ref>{{cite web
|url=http://www.scss.com.au/family/andrew/opera/compatibility/sniffers/
|title=Browser Sniffers
|last=Gregory
|first=Andrew
|date=2005-02-05
|accessdate=2007-11-30
}}</ref><ref>{{cite web
|url=http://operawatch.com/news/2006/06/an-inside-look-at-how-opera-works-on-site-compatibility.html
|title=An inside look at how Opera works on site compatibility
|last=Steen
|first=Hallvord
|publisher=[[Opera Software]]
|date=2006-06-05
|accessdate=2007-11-30
}}</ref> Because of this issue, since version 8.01 Opera has included workarounds to help certain popular but problematic web sites display properly.<ref>{{cite web
|url=http://www.opera.com/docs/browserjs/
|title=Browser JavaScript Explained
|publisher=[[Opera Software]]
|accessdate=2007-10-13
}}</ref><ref>{{cite web
|url=http://www.opera.com/docs/changelogs/windows/801/
|title=Changelog for Opera 8.01 for Windows
|publisher=[[Opera Software]]
|date=2005-06-16
|accessdate=2008-06-20
}}<br/>
{{cite web
|url=http://www.opera.com/docs/changelogs/mac/801/
|title=Changelog for Opera 8.01 for Macintosh
|publisher=[[Opera Software]]
|date=2005-06-16
|accessdate=2008-06-20
}}<br/>
{{cite web
|url=http://www.opera.com/docs/changelogs/linux/801/
|title=Changelog for Opera 8.01 for Linux
|publisher=[[Opera Software]]
|date=2005-06-16
|accessdate=2008-06-20
}}</ref>

Notwithstanding other criticism, when [[Nintendo]] chose in 2006 to adopt Opera as the web browser for its [[Wii]] and [[Nintendo DS|DS]] gaming systems, a Nintendo representative explained:
{{cquote|For our Wii console launch in 2006, we required a browser that was fast and secure with support for the latest standards including [[Ajax (programming)|AJAX]]. Opera proved perfect for our purposes and is an exceptional addition to both the Nintendo DS and the Wii console.|||Genyo Takeda, senior managing director and general manager, Integrated Research & Development Division, [[Nintendo]]|<ref name="A Web Revolution"/>}}

=== Privacy concerns ===
Starting with version 9.50 Opera has fraud protection [http://www.opera.com/docs/fraudprotection/ turned on by default]. This causes privacy concerns. <ref>{{cite web
|url=http://my.opera.com/community/forums/topic.dml?id=233980&t=1223694437&page=1#comment2573065
})
</ref><ref>{{cite web
|url=http://my.opera.com/community/forums/topic.dml?id=167745&t=1223694480&page=1#comment1834190
})
</ref><ref>{{cite web
|url=http://my.opera.com/community/forums/findpost.pl?id=1894144
})
</ref>

==Awards==
{{seealso|Opera Mobile#Awards|Opera Mini#Awards}}

Over the years, Opera for personal computers has received several awards. These awards include:<ref>{{cite web
|url=http://www.opera.com/products/desktop/awards/index.dml
|title=Opera's Awards
|publisher=[[Opera Software]]
|accessdate=2007-12-05
}}</ref>

* ''[[Download.com]]'' top rated, 5 out of 5
* ''[[PC World (magazine)|PC World]]'' World Class Award, 2004 and 2005
* ''Web Host Magazine & Buyer's Guide'' Editors' Choice
* ''PC Magazin'' Testsieger (Test Winner), 2006
* ''PC Plus'' Performance Award
* ''PC World'' Best Data Product, 2003
* ''PC World'' Best i Test, 2003
* ''Web Attack'' Editor's Pick, 2003
* ''[[ZDNet]]'' Editor's Pick, 2000
* ''Tech Cruiser'' Award 4 Excellence, 1999

==Future development==
{{seealso|Opera Mobile#Future development}}
{{future software}}

As the [[Opera Software]] company works on upcoming versions of Opera, they are releasing snapshot [[Software build|build]]s about once a week for testing and [[feedback]].<ref>{{cite web
|url=http://my.opera.com/desktopteam/blog/2007/09/14/opera-9-5-build
|title=Post-Alpha Opera 9.5 Release
|last=Minchinton
|first=Adam
|publisher=[[Opera Software]]
|date=2007-09-14
|accessdate=2007-10-23
}}</ref>

Opera version 10, codenamed ''Peregrine'' (after the [[Peregrine Falcon]]), will have new features like inline spell checking<ref>{{cite web
|url=http://my.opera.com/olli/blog/2008/10/08/opera-9-6-released
|title=Opera 9.6 released
|first=Olli
|publisher=[[Opera Software]]
|date=2008-10-8
|accessdate=2008-10-10
}}</ref>, an improved [[user interface]], increased [[web standards|standards]] support, bug fixes, performance improvements, and new tools for [[web developer]]s.<ref>{{cite web
|url=http://my.opera.com/desktopteam/blog/show.dml/759403
|title=Opera code names uncovered
|last=Borg
|first=Johan
|publisher=[[Opera Software]]
|date=2007-02-16
|accessdate=2007-10-23
}}</ref><ref>{{cite news
|url=http://news.cnet.com/Opera-reveals-version-10-vision/2100-1032_3-6099692.html
|title=Opera reveals version 10 vision
|last=Espiner
|first=Tom
|publisher=[[CNET]]
|date=2006-07-28
|accessdate=2007-10-23
}}</ref> Also, a development build of Opera's layout engine, [[Presto (layout engine)|Presto]], scores 100/100 on the [[Acid3]] standards compliance test and renders the test correctly. However, it does not actually pass the test due to slow performance.<ref>{{cite web
|url=http://labs.opera.com/news/2008/03/28/
|title=Public Acid3 build
|author=Bolstad, Lars Erik
|publisher=[[Opera Software]]
|date=2008-03-28
|accessdate=2008-03-28
}}</ref>

==See also==
{{Commons}}
* [[Comparison of BitTorrent Clients]]
* [[Comparison of web browsers]]
* [[Comparison of e-mail clients]]
* [[Comparison of Internet Relay Chat clients]]
* [[Comparison of news clients]]
* [[Comparison of widget engines]]
* [[Timeline of web browsers]]

==References==
<!--See http://en.wikipedia.org/wiki/Wikipedia:Footnotes for an explanation of how to generate footnotes using the <ref(erences/)> tags-->
{{reflist|2}}

==External links==
*[http://www.opera.com/ Opera Software Homepage]
*[http://dev.opera.com/ Developer's Corner] – has a wealth of information of development with the Opera browser
*[http://operawiki.info/Opera/ Opera Browser Wiki]
*[http://www.opera.com/products/devices/gallery/ Opera Powered products]
*[http://widgets.opera.com/ Opera Widgets]
*[http://www.opera.com/products/desktop/awards/index.dml Opera's Awards]
*[http://www.pcmag.com/article2/0,2817,2319728,00.asp Review of Opera 9.5 (PC Magazine)]


{{OperaBrowser|state=uncollapsed}}
{{Web browsers}}
{{Internet suites}}
{{Earlybrowsers}}
{{IRC clients}}
{{Mac OS X web browsers}}

{{featured article}}

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[[zh:Opera]]

Revision as of 03:34, 11 October 2008

Opera
Developer(s)Opera Software ASA
Initial release1996, 27–28 years ago
Stable release100.0.4815.21 (June 20, 2023; 11 months ago (2023-06-20)[1][2][3])
Preview release
Opera beta

107.0.5045.11 (February 1, 2024; 3 months ago (2024-02-01)[4][5][6])

Opera developer
108.0.5063.0 (January 31, 2024; 3 months ago (2024-01-31)[7][8][9])
Engine
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Edit this at Wikidata
Operating systemCross-platform
Size5.4 MB (Windows) English (US)
7.1 MB (Windows) International
7.9 MB (Mac OS X) Intel
13.5 MB (Mac OS X) Universal
6.9 MB (Linux) Shared QT package
8.7 MB (Linux) Static QT package
(all archived)
Available inVarious languages[10]
TypeInternet suite
LicenseProprietary
Websitewww.opera.com

Opera is a web browser and Internet suite developed by the Opera Software company. Opera handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera is offered free of charge for personal computers and mobile phones, but for other devices it is not free.

Features of Opera include tabbed browsing, page zooming, mouse gestures, and an integrated download manager. Its security features include built-in phishing and malware protection, strong encryption when browsing secure web sites, and the ability to easily delete private data such as cookies and browsing history by simply clicking a button.

Opera runs on a variety of personal computer operating systems, including Microsoft Windows, Mac OS X, Linux, FreeBSD, and Solaris.[11] Though evaluations of Opera have been largely positive, Opera has captured only a fraction of the worldwide personal computer browser market. It is currently the fourth most widely used web browser for personal computers, behind Internet Explorer, Firefox, and Safari.

Opera has a stronger market share, however, on mobile devices such as mobile phones, smartphones, and personal digital assistants. Editions of Opera are available for devices using the Symbian and Windows Mobile operating systems, as well as Java ME-enabled devices. In fact, approximately 40 million mobile phones have shipped with Opera pre-installed. Furthermore, Opera is the only commercial web browser available for the Nintendo DS and Wii gaming systems. Some television set-top boxes use Opera as well, and Adobe licensed Opera technology for use in the Adobe Creative Suite.

History

Main article: History of the Opera web browser
See also: Opera Mobile § History, Opera Mini § History, Nintendo DS Browser § Launch, Internet Channel § History, and Opera Software § History
Håkon Wium Lie, chief technical officer of the Opera Software company and creator of the CSS web standard

Opera began in 1994 as a research project at Telenor, the largest Norwegian telecommunications company. In 1995, it branched out into a separate company named Opera Software ASA.[12] Opera was first released publicly with version 2.0 in 1996,[13] which only ran on Microsoft Windows.[14] In an attempt to capitalize on the emerging market for Internet-connected handheld devices, a project to port Opera to mobile device platforms was started in 1998.[12] Opera 4.0, released in 2000,[13] included a new cross-platform core that facilitated creation of editions of Opera for multiple operating systems and platforms.[15]

Up to this point, Opera was trialware and had to be purchased after the trial period ended. But version 5.0 (released in 2000) saw the end of this requirement. Instead, Opera became ad-sponsored, displaying advertisements to users who had not paid for it.[16] Later versions of Opera gave the user the choice of seeing banner ads or targeted text advertisements from Google. With version 8.5 (released in 2005) the advertisements were removed entirely and primary financial support for the browser came through revenue from Google (which is by contract Opera's default search engine).[17]

Among the new features introduced in version 9.1 (released in 2006) was fraud protection using technology from GeoTrust, a digital certificate provider, and PhishTank, an organization that tracks known phishing web sites.[18] This feature was further improved and expanded in version 9.5, when GeoTrust was replaced with Netcraft, and malware protection from Haute Secure was added.[19]

Also in 2006, editions of Opera were made and released for Nintendo's DS and Wii gaming systems.[20][21][22][23] Opera for the Wii, called the Internet Channel, was free to download from its release on April 12, 2007[24] until June 30, 2007. After June 30, Wii users had to pay 500 Wii Points (about US$5[25]) to download it.[26] The Nintendo DS Browser is likewise not free; it is sold as a physical DS game cartridge.[27]

Features

Main article: Features of the Opera web browser
See also: Opera Mobile § Features, Opera Mini § Features, Nintendo DS Browser § Features, and Internet Channel § Features

The Opera Software company claims that Opera is "the fastest browser on Earth."[28] One set of third-party speed tests concluded that Opera 9.5 was indeed faster than Internet Explorer 7 and prerelease versions of Firefox 3 and Safari 3.[29] However, technology website ZDNet's speed tests showed that out of Internet Explorer 7, Safari 3, and pre-release versions of Firefox 3 and Opera 9.5, the only browser that Opera clearly outperformed was Internet Explorer.[30]

Opera includes built-in tabbed browsing, pop-up blocking, fraud protection, a download manager and BitTorrent client, a search bar, and a web feed aggregator. Opera also comes with an e-mail client called Opera Mail and an IRC chat client built in.[31]

Opera includes a "Speed Dial" feature, which allows the user to add up to nine links to the page displayed when a new tab is opened. Thumbnails of the linked pages are automatically generated and used for visual recognition on the Speed Dial page. Once set up, this feature allows the user to more easily navigate to the selected web pages.[32]

Opera supports "Opera Widgets", small web applications that start from within Opera. Alongside Widgets, "User JavaScript" may be used to add custom JavaScript to web pages, including Greasemonkey scripts. Opera is extensible in a third way via plug-ins, relatively small programs that add specific functions to the browser.[33] However, Opera limits what plug-ins can do and does not support full-fledged third-party extensions to the browser. Opera does this as a quality assurance measure, so that third-party extensions cannot introduce bugs.[34]

Usability and accessibility

Sample mouse gestures in Opera
Back: hold down right mouse button, move mouse left, and release or hold the right button down and click the left button
Forward: hold down right mouse button, move mouse right, and release or hold the left button down and click the right button
New tab: hold down right mouse button, move mouse down, and release. Clicking a link with the middle mouse button produces a similar effect, but the new tab is opened in the background instead of becoming the active tab.

Opera was designed with a commitment to computer accessibility for users who have visual or mobility impairments. As a multimodal browser, it also caters to a wide variety of personal preferences in the user interface.

It is possible to control nearly every aspect of the browser using only the keyboard,[35] and the default keyboard shortcuts can be modified to suit the user.[36][37] Opera also includes support for mouse gestures,[38] patterns of mouse movement that trigger browser actions such as "back" or "refresh".[39]

Page zooming allows text, images and other content such as Macromedia Flash, Java and Scalable Vector Graphics to be increased or decreased in size (20% to 1000%) to help those with impaired vision. The user may also specify the fonts and colors for web pages, and even override the page's CSS styling as well. This can be useful for making sites appear in high contrast or in more readable fonts.[40]

Voice control, co-developed with IBM, allows control of the browser without the use of a keyboard or mouse.[41][42] It can also read aloud pages and marked text.[31]

Privacy and security

Opera has several security features visible to the end user. One is the option to delete private data, such as cookies, the browsing history, and the cache, with the click of a button. This lets users erase personal data after browsing from a shared computer.[43]

When visiting a secure web site, Opera encrypts data using either SSL 3 or TLS,[44][45] both of which are highly secure encryption protocols. It then adds information about the site's security to the address bar. It will also check the web site that is being visited against blacklists of phishing and malware, and warn if it matches any of these lists. This behavior is enabled by default, but the user may opt to not make such checks automatically. If this check is disabled, the user can still check sites individually by opening a Page Info dialog.[46]

The user can protect every saved password stored in Opera with a master password. This way malware and keyloggers cannot decrypt those passwords unless the master password is known. To catch security flaws and other bugs before they are exploited or become a serious problem, the Opera Software company maintains a public web form where users can submit bug reports.[47] According to Secunia, a computer security service provider, 16 security vulnerabilities have been publicly identified in Opera 9.x as of July 2008, zero of which remain unpatched.[48] This stands in contrast to Firefox 3.x (zero out of three known vulnerabilities unpatched),[49] Internet Explorer 7.x (10 out of 29 known vulnerabilities unpatched),[50] and Safari 3.x (two out of five known vulnerabilities unpatched).[51]

However, in January 2007, Asa Dotzler of the competing Mozilla Corporation criticized the Opera Software company for downplaying information about known security vulnerabilities in Opera. Dotzler claimed that users were not clearly informed of security vulnerabilities present in older versions of Opera, and thus they would not realize that they needed to upgrade to the latest version or risk being exploited.[52]

Standards support

Opera was one of the first browsers to support Cascading Style Sheets (CSS), now a major building block of web design.[53] Today, Opera supports many web standards, including CSS 2.1, HTML 4.01, XHTML 1.1, XHTML Basic, XHTML Mobile Profile, XHTML+Voice, WML 2.0, XSLT, XPath, XSL-FO, ECMAScript 3 (JavaScript), DOM 2, XMLHttpRequest, HTTP 1.1, Unicode, SVG 1.1 Basic, SVG 1.1 Tiny, GIF89a, JPEG, and full support for PNG, including alpha transparency.[54]

Since version 9, Opera also passes the Acid2 test, a test of whether or not a browser properly supports certain web standards. Opera was the fourth web browser to pass the test and the first Windows browser to pass the test.[55]

Active efforts are also underway to pass the Acid3 test. The latest stable release, version 9.6, scores an 85/100, and a developmental build scores 100/100, although it still fails the performance aspect of the test.

Other editions

Aside from the main edition of Opera for personal computers, editions of Opera are available for a variety of devices. All are based on the same core,[56] but there is some variation in the features offered and the design of the user interface.

Smartphones and PDAs

File:SE P910i.jpg
Opera Mobile running on the Sony Ericsson P910i Smartphone
Main article: Opera Mobile

Opera Mobile is an edition of Opera designed for smartphones and personal digital assistants (PDAs). The first version of Opera Mobile was released in 2000 for the Psion Series 7 and netBook, with a port to the Windows Mobile platform coming in 2004.[57][58] Today, Opera Mobile is available for a variety of devices that run the Windows Mobile, S60, or UIQ operating systems.[59]

Users may try Opera Mobile free for 30 days, but beyond that it costs US$24.[60] Devices that use the UIQ 3 operating system, such as the Sony Ericsson P990 and Motorola RIZR Z8, come pre-installed with Opera Mobile, the price of Opera Mobile being included in the price of the phone.[59]

One of Opera Mobile's major features is the ability to dynamically reformat web pages to better fit the handheld's display using Small-Scale Rendering technology.[61] Alternatively, the user may use page zooming for a closer or broader look.[62] However, like previous versions of Opera for personal computers, Opera Mobile's user interface has come under fire for being difficult to use or customize.[63][64]

Mobile phones

When a user browses the web using Opera Mini, the request is sent via the General Packet Radio Service (GPRS) to one of the Opera Software company's servers, and that server retrieves the web page, processes it, compresses it, and sends it back to the user's mobile phone.
Main article: Opera Mini

Opera Mini, offered free of charge, is designed primarily for mobile phones, but also for smartphones and personal digital assistants. It uses the Java ME platform and consequently requires that the mobile device be capable of running Java ME applications. The browser began as a pilot project in 2005.[65] After limited releases in Europe,[66][67] it was officially launched worldwide on January 24, 2006.[68]

Opera Mini requests web pages through the Opera Software company's servers, which process and compress them before relaying the pages back to the mobile phone.[69][70] This compression process makes transfer time about two to three times faster[71] and the pre-processing smooths compatibility with web pages not designed for mobile phones.[72]

Nintendo DS

The Nintendo DS
Main article: Nintendo DS Browser

The Nintendo DS Browser is an edition of Opera for the Nintendo DS handheld gaming system. The Nintendo DS Browser was released in Japan July 24, 2006,[73] in Europe October 6, 2006,[74] and in North America June 4, 2007.[75] It is sold as a physical game cartridge for US$30.[27]

The Nintendo DS Browser includes the same Small-Scale Rendering and page zooming technology present in Opera Mobile.[76][62] It also includes handwriting recognition software and an on-screen keyboard to enable user input. Additionally, Nintendo partnered with Astaro Internet Security to provide web filtering for the Nintendo DS Browser. The technology is simply a professionally maintained proxy server that blocks web sites related to pornography, discrimination, security hacking, software piracy, violence, gambling, illegal drugs, alcohol, tobacco, dating, weapons, abortion, and other objectionable content.[77] Users can configure the Nintendo DS Browser to receive web pages through this proxy server, and this setting can be password-protected (by a parent, for example) to prevent circumvention.[78]

In August 2007, the Nintendo DS Browser was quietly discontinued in North America,[79][27] although it is still available from Nintendo's online store.[80]

Wii

The Nintendo Wii
Main article: Internet Channel

On May 10, 2006, the Opera Software company announced that it was partnering with Nintendo to provide a web browser for Nintendo's Wii gaming console.[22][81][82][83] Opera for the Wii, called the Internet Channel, was free to download from its release on April 12, 2007[24] until June 30, 2007. After June 30, Wii users had to pay 500 Wii Points (US$5[25]) to download it.[26]

Scott Hedrick, an executive of the Opera Software company, explained that the Wii browser was designed to suit a "living room environment". In contrast to Opera's appearance on computer monitors, fonts are larger and the interface is simplified for easier use.[84] Notwithstanding the changes in design, the Wii browser supports all the same web standards as the desktop version of Opera 9,[84] including passing the Acid2 test.[85]

Market adoption

Statistics reference: Usage share of web browsers

As of February 2008, usage data gives Opera's overall global share of the browser market as being about 1%[86][87] although Opera's usage share is about 18-20% in Russia[88][89][90][91] and Ukraine,[92] and 5–6% in Poland, Latvia, Lithuania, and the Czech Republic.[93]

Since its first release in 1996, the browser has had limited success on personal computers. It is currently the fourth most widely used web browser for personal computers, behind Internet Explorer, Firefox, and Safari.[86] Opera has had more success in the area of mobile browsing, with product releases for a variety of platforms.[94] Approximately 40 million mobile phones have shipped with a copy of Opera pre-installed.[95]

In addition to mobile phones, smartphones, and personal digital assistants, Opera has found a place with Nintendo's Wii and DS gaming systems. It is used on some television set-top boxes as well.[96] And in 2005, Adobe opted to integrate Opera's layout engine, Presto, into its Adobe Creative Suite applications. Opera technology is now found in Adobe GoLive, Adobe Photoshop, Adobe Dreamweaver, and other components of the Adobe Creative Suite.[97][98]

Critical reception

See also: Opera Mobile § Critical reception, Opera Mini § Critical reception, and Nintendo DS Browser § Critical reception

Critical reception of Opera has been largely positive,[99][100][101] although it has been criticized for website compatibility issues,[102][103] partly because many web sites do not adhere to web standards as diligently as Opera.[104][105][106] Because of this issue, since version 8.01 Opera has included workarounds to help certain popular but problematic web sites display properly.[107][108]

Notwithstanding other criticism, when Nintendo chose in 2006 to adopt Opera as the web browser for its Wii and DS gaming systems, a Nintendo representative explained:

For our Wii console launch in 2006, we required a browser that was fast and secure with support for the latest standards including AJAX. Opera proved perfect for our purposes and is an exceptional addition to both the Nintendo DS and the Wii console.

— Genyo Takeda, senior managing director and general manager, Integrated Research & Development Division, Nintendo, [22]

Privacy concerns

Starting with version 9.50 Opera has fraud protection turned on by default. This causes privacy concerns. [109][110][111]

Awards

See also: Opera Mobile § Awards, and Opera Mini § Awards

Over the years, Opera for personal computers has received several awards. These awards include:[112]

  • Download.com top rated, 5 out of 5
  • PC World World Class Award, 2004 and 2005
  • Web Host Magazine & Buyer's Guide Editors' Choice
  • PC Magazin Testsieger (Test Winner), 2006
  • PC Plus Performance Award
  • PC World Best Data Product, 2003
  • PC World Best i Test, 2003
  • Web Attack Editor's Pick, 2003
  • ZDNet Editor's Pick, 2000
  • Tech Cruiser Award 4 Excellence, 1999

Future development

See also: Opera Mobile § Future development

Template:Future software

As the Opera Software company works on upcoming versions of Opera, they are releasing snapshot builds about once a week for testing and feedback.[113]

Opera version 10, codenamed Peregrine (after the Peregrine Falcon), will have new features like inline spell checking[114], an improved user interface, increased standards support, bug fixes, performance improvements, and new tools for web developers.[115][116] Also, a development build of Opera's layout engine, Presto, scores 100/100 on the Acid3 standards compliance test and renders the test correctly. However, it does not actually pass the test due to slow performance.[117]

See also

Wikimedia Commons has media related to Opera (web browser).

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