Firefox OS 1.2 for developers

Developer Tools

• Firefox OS versions 1.2 and above are compatible with the Firefox App Manager.

HTML

General Gecko:

• The srcdoc attribute of <iframe>, allowing the inline specification of the content of an <iframe>, is now supported (bug 802895).
• When used with a "image/jpeg" type, the method HTMLCanvasElement.toBlob now accepts a third attribute defining the quality of the image (bug 891884).
• The <track> element has been implemented behind the media.webvtt.enabled property (bug 833385).
• The <blink> element support is now completely dropped. The <blink> tag now implements the HTMLUnknownElement interface (bug 857820).
• The range state of the <input> element (<input type="range">) has been switched on by default (bug 841950).
• The HTML5 <data> element has been implemented (bug 839371).
• The HTML5 <time> element has been implemented (bug 629801).
• The range state of the <input> element (<input type="range">) has been implemented, behind the preference dom.experimental_forms_range, only enabled by default on Nightly and Aurora channel (bug 841948).
• The support for the <template> element, part of the Web component specification has been implemented (bug 818976).
• The scoped attribute has been added to the <style> element. It allows to include styles that are isolated from the rest of the document. Such styles can be selected using the :scope CSS pseudo-element introduced in Firefox 20. (bug 508725).
• The new HTML <main> element has been implemented (bug 820508).
• Support for the download attribute on the <a> and <area> element has been added (bug 676619).
• The value auto for the global attribute dir has been implemented (bug 548206).

CSS

General Gecko:

• @font-feature-values rule support (bug 549861)
• StyleRule{Added,Removed,Changed}, StyleSheetApplicableStateChange, StyleSheetChange events (bug 839103)
• The text-decoration-line property, still prefixed, now considers 'blink' as a valid value, though it doesn't blink the content at all (bug 812995).
• The non-standard -moz-text-blink property has been removed (bug 812995).
• Support for the image-orientation property, in its CSS Images & Values Level 4 version, that is with the from-image keyword and EXIF support, has been added (bug 825771).
• Support for position: sticky can be enabled by pref layout.css.sticky.enabled (bug 886646).
• The support for the keyword local as a value of the background-attachment CSS property has been added (bug 483446).
• Support of a non-standard Mozilla-only media query to determine the operating system version has been added: -moz-os-version (bug 810399). The property is currently only implemented on Windows.
• The -moz-osx-font-smoothing CSS property has been added (bug 857142)
• The two values -moz-zoom-in and -moz-zoom-out of the cursor property have been unprefixed to zoom-in and zoom-out (bug 772153)).
• The blink effect for text-decoration: blink; has no more effect, but is still a valid value (bug 857820).
• In-flow ::after and ::before pseudo-elements are now flex items (bug 867454).
• Following a spec change, the initial value for min-width and min-height has been changed back to 0, even on flex items (bug 848539).
• Support for CSS Conditionals (@supports and CSS.supports) has been enabled by default (bug 855455).
• Support for background-clip and background-origin properties in the background shorthand has been implemented (bug 570896).
• The none value of -moz-user-select has now the same behavior than the -moz-none value, aligning Gecko on WebKit (Chrome, Safari), Presto (Opera) and Trident (Internet Explorer) (bug 816298).
• On XHTML content, the auto value of -moz-hyphens incorrectly applied hyphenation rules when the language was not explicitly declared. This is fixed by (bug 702121).
• An auto value has been added to the CSS -moz-orient property. The auto value is equivalent to horizontal when applied to <meter> and <progress> (bug 835883).
• The media query -moz-windows-glass has been added on Windows 7 and earlier Windows system (bug 816803).
• CSS Flexbox has been unprefixed, and is now enabled by default (bug 841876).
• The mask-type property from the CSS Masking specification has been added (bug 793617).
• Experimental support for the :scope pseudo-class has been added. Enabled by default in Aurora and Nightly, it can be enabled in release and beta version by setting the layout.css.scope-pseudo.enabled about:config preference to true (bug 648722).
• Support for the viewport-relative <length> units, vh, vw, vmin, and vmax, has landed (bug 503720).
• The -moz-initial value has been unprefixed (bug 806068). -moz-initial will be kept for a while as an alias; however, authors are strongly encouraged to switch over to initial.
• The CSS text-transform property now supports the full-width keyword, which allows a more seamless inclusion of Latin characters in text using ideographic fixed-width characters, like Chinese or Japanese (bug 774560).
• The CSS page-break-inside has been implemented (bug 685012).
• The CSS calc() function can now be used on <color-stop> (on <gradient>).
• The CSS @page at-rule is now supported (bug 115199). Note that the pseudo-classes :first, :right, and :left are not yet implemented.
• The :-moz-placeholder pseudo-class is replaced by the ::-moz-placeholder pseudo-element (bug 737786).

JavaScript

General Gecko:

EcmaScript 6 (Harmony) implementation continues!

• New mathematical methods have been implemented on Math: Math.fround() (bug 900125).
• The method Array.of() is now implemented on Array (bug 866849).
• The methods Number.parseInt() and Number.parseFloat() have been implemented (bug 886949)
• The methods Map.prototype.forEach() and Set.prototype.forEach() are now implemented (bug 866847)
• New mathematical methods have been implemented on Math: Math.log10(), Math.log2(), Math.log1p(), Math.expm1(), Math.cosh(), Math.sinh(), Math.tanh(), Math.acosh(), Math.asinh(), Math.atanh(), Math.trunc(), Math.sign() and Math.cbrt() (bug 717379).
• Support for binary and octal integer literals has been added: 0b10101010, 0B1010, 0o777, 0O237 are now valid (bug 894026).
• The machine epsilon constant, that is the smallest representible number that added to 1 will not be 1, is now available as Number.EPSILON (bug 885798).
• Arrow functions are no longer automatically in strict mode unless explicitly requested with "use strict" (bug 852762)).
• The String.prototype.repeat JS method has been implemented (bug 815431).
• The Object.defineProperty method can now be used to redefine the length property of an Array object.
• The option to disable JavaScript, including the options to allow moving windows/replace context menu, have been removed. You may still disable JavaScript by double clicking the "javascript.enabled" option in about:config.
• Asm.js optimizations are enabled, making it possible to compile C/C++ applications to a subset of Javascript for better performance.
• ES6 Arrow Function syntax has been implemented (bug 846406).
• The new Object.is function has been added (bug 839979).
• E4X, an ancient JavaScript extension, has been removed. Implemented only in Gecko, it never got significant traction (bug 788293).
• parseInt no longer treats strings with leading "0" as octal (bug 786135).
• Support for the Weakmap.prototype.clear() method, recently added to the Harmony (EcmaScript 6) draft proposal has been added (bug 814562).
• Support for the Math.imul() method, a C-style 32-bit multiplication function. Though proposed for Harmony (EcmaScript 6) it has not yet accepted and still is non-standard (bug 808148).
• Web apps using draggable text with Kinetic 3.x are working, even when using the Cairo canvas backend (bug 835064).
• The for each…in statement has been deprecated and should not be used. Consider using the new for…of statement (bug 804834).
• Support for the Map.prototype.keys, Map.prototype.values, and Map.prototype.entries has been added (bug 817368).
• Map and Set objects have changed from having a size() method to a size property (bug 807001).
• Map and Set objects also have a clear() method now. (bug 805003).

Telephony-specific additions (mostly API-related)

• Fuzzy matcher API for phone numbers (bug 883923)
• CDMA
  • Registration info (bug 882984)
    • (bug 882984)
    • multiple new CDMA specific attributes in MozMobileCellInfo
    • dom/network/interfaces/nsIDOMMobileConnection.idl
  • Emergency callback mode support (bug 887690)
    • new method exitEmergencyCbMode and new event emergencycbmodechange in MozMobileConnection
    • dom/network/interfaces/nsIDOMMozEmergencyCbModeEvent.idl
  • OTASP (bug 882983)
    • new event otastatuschange in MozMobileConnection
    • dom/network/interfaces/nsIDOMMozOtaStatusEvent.idl
  • MDN/MIN (bug 869778)
    • new interface MozGsmIccInfo & MozCdmaIccInfo
    • new attribute iccType in MozIccInfo
    • dom/icc/interfaces/nsIDOMIccInfo.idl
  • Preferred voice mode (bug 869769)
    • new methods setVoicePrivacyMode and getVoicePrivacyMode in MozMobileConnection
    • dom/network/interfaces/nsIDOMMobileConnection.idl
  • Roaming preference (bug 869768)
    • new methods setRoamingPreference and getRoamingPreference in MozMobileConnection
    • dom/network/interfaces/nsIDOMMobileConnection.idl
  • Call Waiting (bug 822210)
    • new attribute secondNumber in TelephonyCall
    • dom/webidl/TelephonyCall.webidl
• Support Change Call Barring Password (bug 905479)
  • new method changeCallBarringPassword in MozMobileConnection
  • dom/network/interfaces/nsIDOMMobileConnection.idl
• Move ICC functions out from MobileConnection (bug 875721, bug 874744, bug 860585, bug 859220)
  • MozIccInfo
    • navigator.mozIccManager.iccInfo
    • new interface
    • dom/icc/interfaces/nsIDOMIccInfo.idl
  • MozIccManager
    • navigator.mozIccManager
    • new attributes, methods, and events
    • dom/icc/interfaces/nsIDOMIccManager.idl
  • MozMobileConnection
    • navigator.mozMobileConnection
    • numerous attributes, methods and events removed
    • dom/network/interfaces/nsIDOMMobileConnection.idl
  • nsIDOMMozMobileICCInfo
    • navigator.mozMobileConnection.iccInfo
    • interface removed
• ICC card lock improvements
  • Rename ICCCardLockErrorEvent to IccCardLockErrorEvent
    • dom/webidl/IccCardLockErrorEvent.webidl
  • Retry count (bug 886239, bug 875710)
    • attribute retryCount removed from MozMobileConnection
    • new method getCardLockRetryCount in MozIccManager
    • dom/network/interfaces/nsIDOMMobileConnection.idl
    • dom/icc/interfaces/nsIDOMIccManager.idl
• Import/export SIM Contacts (bug 847741, bug 847820)
  • new methods readContacts, updateContact in MozIccManager
  • dom/icc/interfaces/nsIDOMIccManager.idl
• ICC Secure Elements (bug 840780)
  • new methods iccOpenChannel, iccExchangeAPDU, iccCloseChannel in MozIccManager
  • dom/icc/interfaces/nsIDOMIccManager.idl
• STK improvements
  • 'duration' for Display Text, Setup Call commands (bug 831630)
    • new attribute duration in both MozStkTextMessage and MozStkSetUpCall
    • dom/icc/interfaces/SimToolKit.idl
  • support "Language Selection Event" (bug 831627)
    • new dictionary MozStkLanguageSelectionEvent
    • dom/icc/interfaces/SimToolKit.idl
  • support "Idle Screen Available Event" (bug 831628)
    • new dictionary MozStkGeneralEvent
    • dom/icc/interfaces/SimToolKit.idl
• MobileMessage
  • Turn getSegmentInfoForText into an async call (bug 903403)
    • dom/mobilemessage/interfaces/nsIDOMMobileMessageManager.idl
  • Remove navigator.mozSms (bug 891235)
• Telephony
  • support "Conference Call" (certified only) (bug 772765)
    • navigator.mozTelephony.conferenceGroup
    • new interface

DOM/API

Firefox OS-specific:

• Device Storage API: When getting a cursor callback from navigator.getDeviceStorage("sdcard").enumerate, this.done was undefined in Firefox <1.2 (see bug 902565). This is now fixed. The referenced bug discusses possible compatibility checks/workarounds for this issue.
• The RTCPeerConnection Interface from WebRTC is implemented, but currently disabled by default in B2G, as it is not yet functional on Firefox OS devices (see bug 942343.)
• Web notifications are supported in Firefox 1.2, therefore the Notification object should be used in preference to the old deprecated mozNotification object (see bug 899574 .)
• mozInputMethod has been added to allow for people to write 3rd party keyboards. See the test application in gaia/test_apps for a reference implementation.
• The Media Recording API has been implemented (see bug 803414, bug 889720)
• KeyboardEvent.repeat now supported (bug 600117)
• 3rd party keyboards now supported (bug 816869)

• OES_element_index_uint
• OES_texture_float_linear
• OES_vertex_array_object
• WEBGL_draw_buffers
• ANGLE_instanced_arrays

General Gecko:

• A .default attribute has now been added to the DeviceStorage API (bug 874213)
• The TCP Socket API has landed (bug 797561)
• Make the last argument (doctype) to DOMImplementation.createDocument optional (bug 909859).
• Implement the new element.classList specification which permits adding/removing several classes with one call (bug 814014).
• The URL() constructor have been implemented on the URL interface (bug 887364).
• The properties URLUtils.origin, URLUtils.password, and URLUtils.username are now available to all interfaces implementing URLUtils: URL, Location, HTMLAnchorElement, and HTMLAreaElement (bug 887364).
• The URL interface is now accessible from Web Workers (bug 887364).
• IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage (bug 785884).
• Path of the persistent storage has been changed from <profile>/indexedDB to <profile>/storage/persistent (on b2g from /data/local/indexedDB to /data/local/storage/persistent).
• The Web Audio API is now supported. An incomplete implementation was previously available behind a preference (bug 779297).
• Some IME related keys on Windows are supported by KeyboardEvent.key (bug 865565), see the key name table for the detail.
• Firefox for Metro now dispatches key events in the same way as the desktop version (bug 843236).
• keypress event is no longer dispatched if preventDefault() of preceding keydown event is called (bug 501496), see the document of keydown event for the detail.
• Renamed the Future interface to Promise (bug 884279).
• The srcDoc property on the HTMLIFrameElement interface, allowing the inline specification of the content of an <iframe>, is now supported (bug 802895).
• The createTBody() method on the HTMLTableElement interface, allowing to get its <tbody>, is now supported (bug 813034).
• The Range.collapse() method toStart parameter is now optional and default to false, like defined in the spec (bug 891340).
• Support of ParentNode interface on Document and DocumentFragment has been added (bug 895974).
• The previousElementSibling and nextElementSibling have been moved to ChildNode allowing them to be called not only on a Element object but also on a CharacterData or DocumentType object (bug 895974).
• The navigator.geolocation property has been updated to match the spec. It never returns null. When the preference geo.enabled is set to false, it now returns undefined (bug 884921).
• The videoPlaybackQuality attribute on the HTMLVideoElement interface has been changed to the getVideoPlaybackQuality method. (bug 889205)
• Support for the Range() constructor has been added (bug 868999).
• Support for the Text() constructor has been added (bug 869000).
• Support for the Comment() constructor has been added (bug 869006).
• Support for the DocumentFragment() constructor has been added (bug 869002).
• The FocusEvent interface has been implemented (bug 855741).
• Support for the ChildNode.remove() method has been added (bug 856629).
• The interfaces related to the <track> element, HTMLTrackElement, TextTrack, TextTrackCue, TextTrackList, and TextTrackCueList have been implemented behind the media.webvtt.enabled property, defaulting to false (bug 833385).
• The Gamepad interface, and Navigator.getGamepads have been implemented behind the dom.gamepad.enabled property, defaulting to false (bug 690935).
• On desktop Firefox only, HTMLCanvasElement.getContext() can now take the webgl value, in addition to experimental-webgl (bug 870232).
• The non-standard method mozLoadFrom() of HTMLMediaElement has been removed (bug 877135).
• D3E KeyboardEvent.key is now supported, but only for non-printable keys (bug 842927).
• The title attribute of DOMImplementation.createHTMLDocument is now optional as per updated DOM specification.
• The ability to add a sidebar panel (window.sidebar.addPanel) has been dropped (bug 691647).
• The unprefixed Window.requestAnimationFrame and Window.cancelAnimationFrame methods has been added (bug 704063).
• The callback for Window.requestAnimationFrame now receives a DOMHighResTimeStamp as argument instead of the less precise DOMTimeStamp used in the unprefixed version (bug 753453).
• The text argument for window.alert and window.confirm is now optional (bug 861605).
• The HTMLMediaElement.initialTime property, removed from the spec, is no more supported (bug 742537).
• The AnimationEvent() constructor has been added (bug 848293).
• The AnimationEvent.pseudoElement property has been implemented (bug 848293).
• The TransitionEvent() constructor has been added (bug 848291).
• The TransitionEvent.pseudoElement property has been implemented (bug 848291).
• The non-standard TransitionEvent.initTransitionEvent() and AnimationEvent.initAnimationEvent() have been removed (bug 868751).
• Support for the multipart property on XMLHttpRequest and multipart/x-mixed-replace responses in XMLHttpRequest has been removed. This was a Gecko-only feature that was never standardized. Server-Sent Events, Web Sockets or inspecting responseText from progress events can be used instead.
• Support for Web Notifications has been landed (bug 782211).
• The FormData  append method now accepts a third optional filename parameter (bug 690659).
• Node.isSupported has been removed (bug 801562).
• Node.setUserData and Node.getUserData has been removed for web content and are deprecated for chrome content (bug 842372).
• The Element.attributes property has been moved there from Node as required by the spec (bug 844134).
• The Mac OS X backend for Ambient Light Events has been implemented.
• Elements in the HTML namespace with local names <bgsound>, <multicol>, and <image> no longer implement the HTMLSpanElement interface.  <bgsound> and <bgsound> implement HTMLUnknownElement and <image> implements HTMLElement.
• The NodeIterator.detach method has been changed to do nothing (bug 823549).
• The BlobEvent interface has been implemented (bug 834165).
• The properties HTMLMediaElement.crossorigin and HTMLInputElement.inputmode has been removed to match the spec in HTMLMediaElement.crossOrigin and HTMLInputElement.inputMode, respectively (bug 847370 and bug 850346).
• WebRTC: the Media Stream API and Peer Connection API are now supported by default.
• Web Components: the Document.register method has been implemented (bug 783129).
• The ProgressEvent.initProgressEvent() constructor method has been removed. Uses the standard constructor, ProgressEvent() to construc and initialize ProgressEvent (bug 843489).
• Manipulated data associated with a cut, copy, or paste event can now be accessed via the ClipboardEvent.clipboardData property (bug 407983).
• The HTMLTimeElement interface has been implemented (bug 629801).
• When a Worker constructor is passed an invalid URL, it now throws DOMException of type SECURITY_ERR (bug 587251).
• The origin property has been added to the window.location (bug 828261).
• The valueAsDate and valueAsNumber methods have been added for <input type="time"> (bug 781570).
• The min and max attributes now apply to <input type="time"> too (bug 781572).
• Some new keyCodes for volume control are supported (bug 674739).
• Some new keyCodes for ancient keyboard layout such as AS/400 are now supported on Windows and Linux (bug 833719).
• Various keyCode values for OEM sepecific keys on Windows are now supported again (bug 833719).
• The function window.crypto.getRandomValues has been implemented (bug 440046).
• The methods NodeIterator.expandEntityReferences() and TreeWalker.expandEntityReferences(), no more in the latest DOM spec, has been removed (bug 672190).
• CSSOM: the method CSSKeyframesRule.insertRule has been removed to CSSKeyframesRule.appendRule to match a spec change (bug 841896).
• CSSOM If the given parameter given to CSSStyleSheet.insertRule contains more than one rule, a DOMException with a SYNTAX_ERR is now thrown (bug 765599).
• Until now, when the same headers were repeatedly set with XMLHttpRequest.setRequestHeader, the last-specified value was used. This behavior has been changed to comply with the spec, so those values will be properly combined (bug 819051).
• HTMLMediaElement supports now playbackRate (both read and write), with pitch correction. Pitch correction can be controlled using the property mozPreservesPitch (bug 495040).
• CSSOM: Support for the new CSSGroupingRule and CSSConditionRule has been added (bug 814907).
• CSSOM: On CSSRule the constant CSSRule.MOZ_KEYFRAME_RULE and CSSRule.MOZ_KEYFRAMES_RULE have been unprefixed to CSSRule.KEYFRAME_RULE and CSSRule.KEYFRAMES_RULE. The prefixed version are temporarily kept for helping Web author to transition their code bug 816431).
• CSSOM: It is now possible to set the value of conditionText for CSSMediaRule (bug 815021).
• The DOMParser parseFromStream and parseFromBuffer methods are no longer available from web content (bug 816410).
• The XMLSerializer serializeToStream method is no longer available from web content (bug 816410).
• TextDecoder and TextEncoder interfaces have been updated to match the latest spec (bug 801487) and are now available in Workers (bug 795542).
• Support for the CSS.supports() method has been added, behind the layout.css.supports-rule.enabled pref (off by default) (bug 779917).
• Support for UndoManager has been added (bug 617532).
• The CSSOM document.caretPositionFromPoint method, which returns a CaretPosition has been implemented.
• The index argument of the tableRow.insertCell and table.insertRow methods has been made optional as per HTML specification.
• Navigator.getUserMedia, still prefixed as Navigator.mozGetUserMedia is now activated by default.
• The third, optional, transfer argument of Window.postMessage is now supported. It allows to transfer a sequence of Transferable objects to the destination (bug 822094).
• The element.getElementsByTagName method will now return HTMLCollection (bug 799464).
• The File mozLastModifiedDate property has been implemented. (bug 793955).
• The File lastModifiedDate property returns the current date, when the date of the last modification is unknown. (bug 793459.
• The CanvasRenderingContext2D isPointInStroke method has been implemented (bug 803124).
• The HTMLCanvasElement toBlob method has been implemented (bug 648610).
• The Node.isSupported and the document.implementation.hasFeature() methods have been changed to always return true (bug 801425).
• When calling document.createElement(null), null will now be stringified and works like document.createElement("null").

SVG

General Gecko:

• Inconsistent renderings of <mmultiscripts>,  <msub>, <msup> and <msubsup> have been unified and the error handling of these elements has been improved (bug 827713).
• The paint-order attribute has been implemented (bug 828805).
• The implementation of the contentScriptType and contentStyleType properties has been removed from SVGSVGElement along with the removal from SVG2 (bug 819731).

MathML

General Gecko:

• The dir attribute for controlling directionality of formulas on e.g. <math> or <mrow> elements is now equivalent to using the direction CSS property.
• The equal sign ("=") is now stretchable.
• The "updiagonalarrow" value for the notation attribute on <menclose> elements has been added.
• Negative widths for the <mspace> element has been implemented (bug 717546).
• The <semantics> element now determines the visible child as described in the MathML3 specification.
• To help MathML authors debugging "invalid-markup" errors in their documents, MathML parsing errors (such as having too many / too few child elements) and warnings about deprecated attributes or wrong attribute values are now reported to the Error Console.
• The scriptminsize attribute now accepts unitless values and percent values. They are interpreted as multiples of the default value ("8pt").
• Unitless values are now also allowed for the mathsize and fontsize attributes; they multiply the default value.

Network

General Gecko:

• We continue to update our CSP implementation to match the CSP 1.0 spec, which reached Candidate Recommendation:
  • Support for the spec-compliant Content-Security-Policy HTTP header (in addition to the experimental X-Content-Security-Policy) has been added (bug 783049). Note: the patch for this new header landed in Firefox 21, it is disabled on builds (bug 842657).

Worker

General Gecko:

• The functions URL.createObjectURL and URL.revokeObjectURL are now included in the set of functions available to workers.

Security

General Gecko:

• Mixed content blocking. Firefox will no longer load non-secure (http) resources on secure (https) pages (bug 834836).
• The standard syntax of CSP 1.0 policies are now implemented and enforced by default.

XForms

General Gecko:

Support for XForms has been removed in Firefox 19.

See also

• Firefox OS 1.2 Notes

Older versions

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