*#REDIRECT [[Opera (web browser)]] {{R from merge}}▼{{NPOV}}
Since [[Opera Software]] started developing their browser [[Opera (browser)|Opera]], they've been innovating the browser market in a number of ways, such as by introducing a search field in the interface, [[mouse gesture]]s, reload cache, certain features in its M2 [[e-mail client]], custom rendering modes, user scripting ("User[[JavaScript|JS]]"), and site-specific settings. It was a commercial browser for 10 years, and was recently made [[Gratis versus Libre|free of charge]] (as of [[September 20]], [[2005]]). However, there are still many criticisms of Opera.
== General criticisms==
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* Opera is [[closed-source]].
* Opera Software does not run an open-readable Bug Tracking system. This means that users are less likely to submit good (or any) bug reports - compiling a bug report can take considerable time and the reporter has no idea if they are wasting time because they cannot know if the bug is already reported. Further to is the "one-way street" nature of bug reports to Opera, in that reports are sent to, but seldom replied to or acknowledged in any non-automatic way by Opera developers. These criticisms were brought to the attention of Opera Software in a January 2006 [http://interviews.slashdot.org/interviews/06/01/03/147256.shtml Slashdot interview with Jon von Tetzchner] the CEO of Opera Software, however no change has been made to address these issues since the interview.
== Criticisms from Internet Explorer or Mozilla Firefox users ==
===Website rendering===
Opera has been criticized for different or incorrect website rendering. There are several reasons why Opera sometimes does not render a website as the others do:
* Since [[Internet Explorer]] and Netscape/Firefox has held such a strong position in the market, some web site authors code exclusively for these browsers and their features and bugs. Opera is often given bad code since sites do not recognize it as having a good rendering engine. Opera has a spoofing feature that can work around this in many cases though.
* Lack of [[ActiveX]] support.
* Broken websites that rely on error handling in certain browsers. Since error handling is poorly specified, this is different in all browsers.
* An Opera bug or unimplemented standard.
In the case of website rendering problems, a user may deal with the problem in three ways:
#By contacting the [[webmaster]], mentioning the problem, and asking if they can update their affected web pages to include Opera.
#By posting the encountered problem in the [http://my.opera.com/community/forums Opera community forums] and asking if a fix is available either by an updated ua.ini (to spoof the browser idendity almost completely), browser.js (to fix important websites by overriding or patching specific website code) or a fix by using [http://userjs.org/ User Javascript].
#By using the "Report a site problem" option in the Help menu in Opera to report the issue to Opera Software.
=== User interface ===
1. Some of Opera's default keyboard shortcuts differ from other browsers. Although these shortcuts can be edited by the user.
2. Opera does not provide the context menu with related commands on Bookmarks menu items.
== Criticisms from Mozilla Firefox users ==
=== Browser upgrade ===
Opera users must download a whole setup file for every minor release, where some other browsers have implemented incremental updates. Although the classic installer size for Opera is still noticably smaller than Mozilla Firefox.
=== Functionality ===
Although Opera provides more features than other browsers out of the box, it does not provide an architecture to add extra programs in the browser, like for example Mozilla and Internet Explorer. It provides an interface for adding in User-Javascripts and with version 9 has widget functionality.
=== User interface ===
Since Opera is an MDI program, it will switch to the last used tab when closing the current one, unlike for example Mozilla Firefox who switches to the tab to the right of the current tab. ''In theory'' this behaviour is changable in Opera 9's settings but '''the setting doesn't work''' and this behaviour is quite annoying for users used to Mozilla Firefox.
== Criticisms from users of other Internet suites ==
1. Lack of developer tools in the browser, although there exist toolbars and buttons the user can add to provide some of the functionality found in professional developer tools.
3. The E-Mail client in Opera does not yet provide Rich Text (HTML) editing.
4. Opera Lacks a full featured FTP client, users can only download things from servers, but they cannot upload and manage files.
5. The lack of a calendar and a task manager in the E-Mail client.
== Footnotes ==
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# {{note|Greasemonkey}} [http://www.opera.com/support/tutorials/userjs/examples/#greasemonkey How to use Greasemonkey scripts in Opera] ''Opera Software''
# {{note|OpRel}} [http://ftp.opera.com/pub/opera/win/ Index of public versions ] ''Opera Software''
# {{note|MFRel}} [http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ Index of public, RC and beta versions of Mozilla Firefox] ''Mozilla.org''
# {{note|OpSpec}} [http://www.opera.com/docs/specs/ Web Specifications Supported in Opera] ''Opera Software''
# {{note|MFWebStSupport}} [http://developer.mozilla.org/en/docs/Firefox_1.5_for_Developers#Support_for_open_Web_standards Firefox 1.5 for Developers - Support for open Web standards] ''Mozilla Developer Center''
# {{note|InnerHTML}} [http://www.quirksmode.org/dom/innerhtml.html Quirksmode.org benchmarks browsers with regards to innerHTML and DOM insertion performance.] ''Quirksmode.org''
==See also==
*[[Presto (layout engine)]]
*[[Opera Software]]
▲*[[Opera (web browser)]]
*[[Internet Explorer]]
*[[RSS (file format)]]
*[[Tab (GUI)]]
*[[file transfer protocol|FTP]]
*[[Web Browser]]
*[[HTML]]
==External links==
*[http://www.opera.com Official Opera Website]
*[http://nontroppo.org/wiki/Opera Opera wiki]
[[Category:Criticisms|Opera]]
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