Firefox 3.5 introduces a number of new features, as well as additional and improved support for a wide variety of web standards. This article offers an extensive list, with links to articles covering the major improvements.
New developer features in Firefox 3.5
For web site and application developers
HTML 5 support
- Using audio and video in Firefox
- Firefox 3.5 adds support for the HTML 5
audioandvideoelements. - Offline resources in Firefox
- Firefox 3.5 now fully supports the HTML 5 offline resource specification.
- Drag and drop
- The HTML 5 drag and drop API allows support for dragging and dropping items within and between web sites. This also provides a simpler API for use by extensions and Mozilla-based applications.
Newly-supported CSS features
- Downloadable fonts support
- The new {{ cssxref("@font-face") }} @rule lets web pages provide downloadable fonts, so that sites can be rendered exactly as the page author expects.
- CSS media queries
- Firefox 3.5 now supports CSS media queries, which enhance support for media-dependent style sheets.
- {{ cssxref(":before") }} and {{ cssxref(":after") }} updated to CSS 2.1
- The
:beforeand:afterpseudo-elements have been updated to full CSS 2.1 support, adding support for theposition,float,list-style-*, and somedisplayproperties. chunits for length- The
chunit can now be used anywhere that accepts a unit of length.1chis the width of the "0" (zero) character. - {{ cssxref("opacity") }}
- The
-moz-opacityMozilla extension to CSS has been removed in favor of the standardopacityproperty. - {{ cssxref("text-shadow") }}
- The
text-shadowproperty, which allows web content to specify shadow effects to apply to text and text decorations, is now supported. - {{ cssxref("word-wrap") }}
- This newly-supported property lets content specify whether or not lines may be broken within words in order to prevent overflow when an otherwise unbreakable string is too long to fit on one line.
white-spaceproperty supports thepre-linevalue- The {{ cssxref("white-space") }} property now accepts the
pre-linevalue. - {{ cssxref("-moz-box-shadow") }}
- {{ cssxref("-moz-border-image") }}
- {{ cssxref("-moz-column-rule") }}
- {{ cssxref("-moz-column-rule-width") }}
- {{ cssxref("-moz-column-rule-style") }}
- {{ cssxref("-moz-column-rule-color") }}
- Firefox 3.5 adds support for these Mozilla extensions to CSS.
- The {{ cssxref("color_value#Mozilla_Extensions","-moz-nativehyperlinktext") }} color value
- This new color value represents the user's system's default hyperlink color.
- The {{ cssxref("-moz-window-shadow") }} property and the {{ cssxref(":-moz-system-metric(mac-graphite-theme)") }} pseudo-class
- These new CSS features were added to facilitate theming.
- New values for {{ cssxref("-moz-appearance") }}
- The
-moz-win-glassand-moz-mac-unified-toolbarvalues have been added to-moz-appearance. - Using CSS transforms
- Firefox 3.5 supports CSS transforms. See {{ cssxref("-moz-transform") }} and {{ cssxref("-moz-transform-origin") }} for details.
- {{ cssxref(":nth-child") }}
- {{ cssxref(":nth-last-child") }}
- {{ cssxref(":nth-of-type") }}
- {{ cssxref(":nth-last-of-type") }}
- {{ cssxref(":first-of-type") }}
- {{ cssxref(":last-of-type") }}
- {{ cssxref(":only-of-type") }}
- These selectors are all newly-supported in Firefox 3.5.
New DOM features
- localStorage
- Firefox 3.5 adds support for the Web Storage
localStorageproperty, which provides a way for web applications to store data locally on the client's computer. - Using web workers
- Firefox 3.5 supports web workers to allow easy multi-threading support in web applications.
- Using geolocation
- Firefox 3.5 supports the Geolocation API, which allows web applications to obtain information about the user's current location if a provider for that information is installed and enabled.
- Locating DOM elements using selectors
- The selectors API allows querying a document to locate the elements that match a given selection rule.
- Mouse gesture events
- Firefox 3.5 supports mouse gesture events such as trackpad swipes.
- The
NodeIteratorobject - The
NodeIteratorobject provides support for iterating over the list of the nodes in a DOM subtree. - The MozAfterPaint event
- This new DOM event is sent after painting updates in windows.
- The MozMousePixelScroll event
- This new DOM event allows detection of pixel-based mouse scroll wheel events instead of line-based scroll events.
New JavaScript features
- New in JavaScript 1.8.1
- An overview of all the changes in JavaScript 1.8.1.
Object.getPrototypeOf()- This new method returns the prototype of a specified object.
- Using native JSON
- Firefox 3.5 has native support for JSON.
- New trim methods on the String object
- The
Stringobject now hastrim(),trimLeft(), andtrimRight()methods.
Networking
- Cross-site access controls for HTTP
- In Firefox 3.5, it's now possible for HTTP requests, including those made by
XMLHttpRequest, to work across domains if the server supports it. - Progress events for
XMLHttpRequest - Progress events are now offered to enable extensions to monitor the progress of requests.
- Improved Synchronous
XMLHttpRequestsupport - DOM Timeout and Input Events are now suppressed during a synchronous
XMLHttpRequest. - Controlling DNS prefetching
- Firefox 3.5 provides DNS prefetching, whereby it performs domain name resolution ahead of time for links included in the current page, in order to save time when links are actually clicked. This article describes how you can tune your web site to disable prefetching, or to adjust how prefetching operates.
New Canvas features
- HTML 5 text API for
canvaselements - Canvas elements now support the HTML 5 text API.
- Shadow effects in a
canvas - Canvas shadow effects are now supported.
createImageData()- The canvas method
createImageData()is now supported, allowing code to specifically create anImageDataobject instead of requiring it to be done automatically. This can improve performance of otherImageDatamethods by preventing them from having to create the object. moz-opaqueattribute- Added the
moz-opaqueDOM attribute, which lets the canvas know whether or not translucency will be a factor. If the canvas knows there's no translucency, painting performance can be optimized.
New SVG features
- Applying SVG effects to HTML content
- You can now apply SVG effects to HTML and XHTML content; this article describes how.
Miscellaneous new features
- ICC color correction in Firefox
- Firefox 3.5 now supports ICC color correction for tagged images.
- The
deferattribute is now supported onscriptelements - This attribute indicates to the browser that it may choose to continue to parse and render the page without waiting for the script to finish executing.
Other improvements
- The Text node's
wholeTextproperty andreplaceWholeText()method have been implemented. - The property
element.childrenhas been added. It returns a collection of child elements of the given element. - The property {{ domxref("element.contentEditable") }} is now supported, to support editable elements.
- The Element Traversal API is now supported by the DOM Element object.
- HTML document nodes may now be cloned using
cloneNode(). - The non-standard
getBoxObjectFor()DOM method has been removed. You should be usinggetBoundingClientRect()instead. - Dispatched DOM events can now be re-dispatched. This makes Firefox 3.5 pass Acid 3 test 30.
- Improvements have been made to DOM 2 Range handling.
- In non-chrome scope, caught objects in exceptions are now the actual thrown object instead of an XPConnect wrapper containing the thrown object.
- SVG ID references are now live.
- SVG filters now work for
foreignObject. - The
GetSVGDocument()method has been added toobjectandiframeelements for compatibility. - Implicit setting of properties in object and array initializers no longer execute setters in JavaScript. See the blog post Object and array initializers should not invoke setters when evaluated for details.
- The
gDownloadLastDir.pathvariable has been renamed togDownloadLastDir.filesince it refers to an {{ interface("nsIFile") }}, not a path. - The
gDownloadLastDirPathvariable has been renamed togDownloadLastDirFilesince it refers to an {{ interface("nsIFile") }}, not a path. - Starting in Firefox 3.5, you can no longer use
data:bindings in chrome packages that getXPCNativeWrapperautomation.
For XUL and add-on developers
If you're an extension developer, you should start by reading Updating extensions for Firefox 3.5, which offers a helpful overview of what changes may affect your extension.
New components and functionality
- Supporting private browsing mode
- Firefox 3.5 offers Private Browsing mode, which doesn't record the user's activities. Extensions may support private browsing following the guidelines offered by this article.
- Security changes in Firefox 3.5
- This article covers security-related changes in Firefox 3.5.
- Theme changes in Firefox 3.5
- This article covers theme-related changes in Firefox 3.5.
- Monitoring WiFi access points
- Code with UniversalXPConnect privileges can now monitor the list of available access points, getting information on their SSIDs, MAC addresses, and signal strength. This can be used in tandem with Geolocation to offer WiFi-based location service.
Notable changes and improvements
- The XUL
textboxwidget now offers asearchtype, for use as search fields. - In order to support dragging and dropping tabs between windows, the
browserwidget now has aswapDocShells()method. - Added the
levelattribute to thepanelelement; this specifies whether panels appear on top of other applications, or just on top of the window the panel is contained within. - XUL elements now support the
clientHeight,clientWidth,scrollHeight, andscrollWidthproperties. keysets now include adisabledattribute.- In addition,
keysets can now be removed using the node'sremoveChild()method. mozIStorageStatementhad theinitialize()method removed; consumers should use thecreateStatement()method instead to get a new statement object.- The Storage API now offers support for asynchronous requests.
- The
nsICookie2interface now exposes the time at which cookies were created in its newcreationTimeattribute. - Added a flag to
nsIProtocolHandler(URI_IS_LOCAL_RESOURCE) that is checked during chrome registration to make sure a protocol is allowed to be registered. - Firefox now looks for plugins in
/usr/lib/mozilla/pluginson Linux, as well as the previously supported locations. - The plugin API has been updated to include support for private browsing mode; you may now use
NPN_GetValue()to query the state of private browsing mode using the variableNPNVprivateModeBool.
New features for end users
User experience
- Location aware browsing
- If you choose, you may allow Firefox 3.5 to share information about your current location with web sites. Firefox 3.5 can use information about the network you're connected to to share your location. Of course, it asks for your permission before doing so, to ensure your privacy.
- Open audio and video support
- Firefox 3.5 supports embedded video and audio using the open Ogg format, as well as WAV for audio. No plugins, no confusing error messages about needing to install something or other that turns out not to be available on your platform anyway.
- Local data storage
- Web applications can now use Web Storage's local storage capabilities to store data on your computer. This is great for anything from site preferences to more complex data.
Security and privacy
- Private Browsing
- Need to use someone else's computer? Switch on Private Browsing mode and nothing will be recorded about your session, including cookies, history, and any other potentially private information.
- Better privacy controls
- The Privacy preference pane has been completely redesigned to offer users more control over their private information. Users can choose to retain or discard anything including history information, cookies, downloads, and form field information. In addition, users can specify whether or not to include history and/or bookmarks in the location bar's automated suggestions, so you can keep private web addresses from popping up unexpectedly while typing in the location bar.
Performance
- Faster JavaScript performance
- JavaScript, the "J" in "AJAX," is sped up dramatically in Firefox 3.5 with the new TraceMonkey JavaScript engine. Web applications are much faster than in Firefox 3.
- Faster page rendering
- Web content draws faster in Firefox 3.5, thanks to technologies such as "speculative parsing." Your users don't need to know what it means, other than "it makes things draw faster."
See also
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