Opera 10 beta for Windows changelog

Release notes

Release date: June 3, 2009

This is a beta version of Opera. Please use it only on properly backed up computers.

New and improved features

Auto update (New)

Opera now includes the ability to update itself automatically when new releases become available. By default, Opera will notify the user about available updates. Users can specify that snapshot build releases of Opera should be downloaded by enabling "Download All Snapshots" in opera:config. Users can also choose not to check for updates or to automatically install updates by going to Tools > Preferences > Advanced > Security and changing the "Opera update level" (select box) to the: "Automatically install updates" setting.

Crashlogging tool (New)

An integrated user interface for built-in crash reporting has been added to Opera. This feature automatically appears when Opera has suffered a crash and enables a user to easily report the event directly back to Opera.

Inline spell checker (New)

Spelling errors are now indicated as you type via a dotted red underline in all places where you can input text: form fields, Opera Mail compose windows, Notes, Chat, etc. Only single-line text fields do not check spelling automatically. The spelling checker can be enabled/disabled from the context menu (right-click a text field to open this menu). The context menu also includes spelling suggestions, the ability to change dictionary languages, and the ability to select additional dictionaries for automatic download and installation. Opera uses the Hunspell dictionary format, and a US English dictionary is included by default.

Opera Dragonfly (Improved)

Additions to Opera Dragonfly developer tools include HTTP header inspection, DOM editing, and automatic selection of the current tab; see this Opera reference.

Opera Mail

Rich Text Message Composition — HTML authoring (New)

Opera Mail can now send rich text messages including inline images, styled text, links, and/or custom HTML.

  • Rich text composition can be enabled by default for an account on the Outgoing tab of the account settings dialog by checking "Prefer HTML formatting". It can also be enabled on a per message basis in the message composition window.
  • Bold styling, italic styling, and underline styling can respectively be toggled using Ctrl-B, Ctrl-I, and Ctrl-U.
  • Forwarding and redirecting rich text messages is now available.
  • Rich text message signatures can be implemented through Tools > Mail and Chat Accounts > Manage Accounts > Edit > Outgoing > Edit signature. Click "Use HTML Formatting" (radio button).
  • Rich text messages with attachments are also supported.
Delete After X Days — POP-only (New)

Delete after X days automatically removes messages from POP servers after the specified number of days, which is particularly useful for users who have limited server space. This option can be enabled for POP accounts on the Incoming tab of the account settings dialog by checking "Remove from server after #days" (7 days by default). It is also possible to specify that only read messages and/or only fully downloaded messages should be removed. Warning: Disabling the latter option is dangerous for those that use low-bandwidth mode, as messages that are not completely downloaded will be removed from the server, making it impossible to retrieve the complete message.

Opera Presto 2.2 rendering engine (Improved)

The Opera Presto rendering engine has been updated to version 2.2 further enhancing its reputation for stability and security. It is identified within the user agent string of Opera/9.80 (Windows NT 5.1; U; en) Presto/2.2.15 Version/10.00, which is located in the main Toolbar under Help > About Opera; see this Opera reference.

Opera Turbo (New)

This new Opera feature increases your internet bandwidth speed on slow connections using data and image compression technologies. Opera Turbo uses Opera proxy servers to compress the traffic before it reaches the Opera browser on the client’s computer; see this Opera reference. Opera Turbo can easily be configured to suit your browsing needs:

  1. Right click the Opera Turbo icon located on the left side of the Status Bar.
  2. In the context menu, select "Configure Opera Turbo" to open the Opera Turbo Settings dialog box.
  3. The following choices can now be made:
    • Automatic (radio button): Turbo will enable only if it detects a slow network
    • On (radio button): Optimize pages with Turbo so they load faster on slow networks
    • Off (radio button): Load pages normally
    • Notify me about network speed (checkbox): network speed indicator becomes visible within the Opera Turbo icon on the Status Bar

Opera User Interface

Skin elements (New)

New skin elements have been applied to the Opera 10 Beta 1 user interface, and will continue to be added as Opera 10 progresses to its final release; see this Opera reference. Some of these are:

  • Etch effects and border inner highlights have been applied giving extra crispness to edges.
  • Text Shadow has a new parameter. This was added to reproduce the etched text effect that is standard on OS X® and many Windows® applications.
  • Horizontal and vertical splitters can now be skinned.
Speed Dial configuration options (New)

You can now easily configure how many speed dials will fit comfortably on your Opera desktop. Click "Configure Speed Dial" in the lower-right corner of the Speed Dial page to open the configuration dialog box. Three tools are available:

  1. Background image
    1. Browse to an image you wish to use as the background of your Speed Dial page.
    2. Position this image on the Speed Dial page by selecting center, stretch, or tile.
  2. Layout of your speed dials
    1. Select which dial layout best suits your monitor size:
      • Small (2 x 2): renders a 4 speed dial grid
      • Normal (3 x 3): renders a 9 speed dial grid
      • Wide screen (4 x 3): renders a 12 speed dial grid
      • Large screen (4 x 4): renders a 16 speed dial grid
      • Large wide screen (5 x 4): renders a 20 speed dial grid
      • Extra large screen (5 x 5): renders a 25 speed dial grid
  3. Hide Speed Dial
    1. Unchecked by default, check this box to hide all speed dials.
Enhanced tabs (New)

The Tab Bar can now be used to show all open tabs as thumbnails.

  1. Open the Tab Bar in the Opera user interface:
    1. In the main Opera Tool Bar, navigate to View > Toolbars > Tab Bar.
    2. Click the Tab Bar check box. This opens the Tab Bar in the Opera user interface.
  2. In the Tab Bar, middle-click or double-click the drag bar [...] to fully expand or collapse all open tabs into thumbnails, or
  3. Grab the lower border of the Tab Bar or grab the drag bar and:
    1. move it down to expand all open tabs into thumbnails;
    2. move it up to collapse all open thumbnails back into tabs;
    3. slowly expand and collapse the Tab Bar to adjust the tab thumbnails to a size of your choice.
  4. Functional note: The Tab Bar select box is set to "No wrapping" by default (right-click the Tab Bar, in the context menu click "Appearance", "Wrapping" is set to the "No Wrapping" selection). If you change this selection to "Wrap to multiple lines", Tab Bar thumbnails will not function.
Pretty-printing of unstyled XML (New)

Opera incorporates "pretty-print XML", which is now the default styling for unstyled XML and uses the unstyledxml.css style sheet in the Styles sub-directory of the Opera installation directory.

Regular expression engine (Improved)

Opera 10 Beta 1 has an improved and faster regular expression engine that uses a stack-based bytecode instruction set. This type of instruction set is based around a stack of values, where most instructions "pop" input operands from the value stack, process them, and "push" the result back onto the value stack. Some instructions simply push values onto the value stack, and others rearrange the values on the stack. This results in compact bytecode programs with code that is easily generated. It is a typical backtracking regular expression engine, but does some tricks to avoid redundant backtracking. These usually avoid the severe performance issues a backtracking regular expression engine can have on specific regular expressions.

Web specifications support

Acid3 test

  • Opera 10 Beta scores 100/100, pixel perfect on the Acid3 compliance test; see our Opera reference.

CSS (Cascading Style Sheets)

  • Support for the CSS3 color:transparent value has been improved.
  • Full RGBA and HSLA opacity support is now included for an easier way to make Web page features transparent. This is accomplished by the addition of a fourth argument to HSL and RGB, namely alpha transparency and results in RGBA and HSLA values. See this Opera reference.
  • Support has been added for the CSS Selectors API. This feature makes the selection of DOM elements a lot simpler. It includes partial support for namespace resolver features which allow you to work with mixed namespace documents and select elements based on their namespace; see this Opera reference.
  • CSS files must now be served with the correct MIME type ("text/css") in Strict mode, or they will be ignored.

HTML 5 support

  • HTML 5 algorithms have been implemented for detecting charsets in HTML.
  • HTML 5 end-tag and start-tag parsing, whitespace parsing, and DOCTYPE parsing have been added.
  • HTML 5 <canvas> elements can now export images to the JPEG format.
  • HTML 5 <canvas> transforms are applied when building a path, not when painting it.

SVG (Scalable Vector Graphics)

  • FPS (Frames Per Second) support: Opera enables you to manipulate the speed (frames per second) of your SVG animations using JavaScript by supporting the SVGElement.currentFps and SVGElement.targetFps properties. These properties respectively read and control SVG frames per second; see this Opera reference.
  • SVG fonts in HTML support: Use SVG font files to style your text using CSS (in both HTML and SVG files); see this Opera reference.

Web fonts support

  • font specification (@font-face CSS at-rules) with the font-family descriptor
  • src descriptor with local and remote
  • TrueType (TTF)
  • OpenType (OTF)
  • Scalable Vector Graphics (SVG) font support

See this Opera reference and demonstration.

Changes since Opera 9.64

User Interface

  • "Remove From Toolbar" and other toolbar customization options have been moved into a submenu.
  • The ability to reset toolbar customization has been added.
  • The search field can now be resized.

Mail, News, Chat

  • A delete after X number of days facility has been added.
  • Mails can now have horizontal scrollbars.
  • Fixes have been made to mail compose.
  • The adding of links to HTML mails has been improved.
  • A recovery mechanism for corrupt mail databases has been added.
  • Feed progress which sometimes stuck on non-existent resources has been fixed.
  • Attachments in multipart/mixedpart of multipart/alternative mail are now correctly displayed.
  • When viewing a message, message subjects are now a text field again instead of a button.
  • Additional online feed readers have been added to the feed preview page.
  • Sent mail is now shown when using threading in the e-mail client.
  • Keyboard shortcuts for Go to Thread (D), Watch Thread (Ctrl-D), and Ignore Thread (Ctrl-Shift-D) have been added.
  • The encoding mismatch dialog has been removed.
  • A thread button has been added to the message list toolbar.
  • Threaded messages sorted by date are now sorted by the last arrived message instead of the first.
  • Right-to-left (RTL) text improvements have been made:
    • autodetection of RTL
    • sending of RTL HTML messages
    • replying to RTL messages should reply in RTL ++

Display and scripting

  • Full RGBA support is now included.
  • Basic Web font support has been added:
    • font specification (@font-face CSS rule) with the font-family descriptor that controls font choices
    • src descriptor with local and remote
    • Truetype (ttf) and Scalable Vector Graphics (svg) font support
  • Support has been added for the W3C Selectors API.
  • The objects returned by getClientRects() and getBoundingClientRect() have been renamed to ClientRectList and ClientRect instead of TextRectangle and TextRectangleList.
  • XMLHttpRequests will now trigger start-loading/end-loading events.
  • The proprietary window.setDocument method has been removed.
  • Support has been added for the SVGElement.currentFps and SVGElement.targetFps properties to read and control SVG frames per second.
  • The load event for scripts is now sent after the script is executed rather than before.
  • The load event is now sent to frame/iframe/object elements before it is sent to the document.
  • A highlight will no longer be added when HTMLElement.focus() is called unless keyboard navigation is already activated.


  • Support for TLS 1.2 has been added.
  • SSL v2 and weak cipher support have been completely removed.


  • Fixes have been applied to font fallback problems, particularly for those using Russian as their default language in Windows.
  • Opera no longer recognizes or supports the http://www.w3.org/TR/REC-html40 namespace as an alias of http://www.w3.org/1999/xhtml.
  • Core fixes, including fixes for getElementsByClassName have been made, which should now work with multiple classes in className.
  • Regex \b is now correctly not matching the point between a letter and underscore.
  • Facebook chat has been fixed.
  • Image downloading has been improved.
  • Gmail problems have been solved.
  • Files generated by the Opera installer now use the same naming scheme across different platforms.
  • Support for UTF-32 encoding has been removed.
  • User JS files will now be executed in alphabetical order rather than file system order.
  • The first ID (instead of the last) is now used on pages with duplicate IDs when navigating to fragment IDs.
  • Support for the altGlyph element in SVGs has been added.
  • Support for 32-bit alpha in BMP and RLE-encoded BMP images has been added.
  • Several memory leaks have been plugged.
  • Several stability issues have been fixed.
  • Network access for widgets is now opt-in:
    • All existing widgets must be updated in order to have network access.
    • All widgets on widgets.opera.com have been given Internet access.
    • Network access is specified using the network attribute of the widget element:
      • Widgets that use <widget network="private"> will have Intranet access only.
      • Widgets that use <widget network="private public"> will have Intranet and Internet access.


Opera Help

Need help? Hit F1 anytime while using Opera to access our online help files, or go here.