--- title: Firefox 62 for developers slug: Mozilla/Firefox/Releases/62 translation_of: Mozilla/Firefox/Releases/62 ---
This article provides information about the changes in Firefox 62 that will affect developers. Firefox 62 is the current Beta version of Firefox, and will ship on September 5, 2018.
help
property, which isn't properly implemented in Gecko ({{bug(1467643)}}).keyboardShortcut
property now correctly exposes any keyboard shortcut available to activate the currently inspected node ({{bug(1467381)}}).没有变化。
:-moz-selection
has been unprefixed ({{bug(509958)}}).x
is now supported as a unit for the <resolution>
type ({{bug(1460655)}}).shape-margin
, shape-outside
, and shape-image-threshold
are now enabled by default ({{bug(1457297)}}).No changes.
import.meta
property has been implemented to expose context-specific metadata to a JavaScript module ({{bug(1427610)}}).false
instead of true
({{bug(1308735)}}).DOMPoint
and DOMPointReadOnly
constructors no longer support an input parameter of type DOMPointInit
; the values of the properties must be specified using the x
, y
, z
, and w
parameters ({{bug(1186265)}}).MediaStream
directly now ({{bug(1454889)}}).No changes.
No changes.
"media.autoplay.enabled"
preference now controls automatic playback of both audio and video media, instead of just video media ({{bug(1413098)}}).channelInterpretation
set to "discrete"
and the channelCountMode
set to "explicit"
per the specification ({{bug(1456265)}}).No changes.
CSSStyleDeclaration.getPropertyCSSValue()
has been removed ({{bug(1408301)}}).CSSValue
, CSSPrimitiveValue
, and CSSValueList
has been removed ({{bug()}}).window.getComputedStyle()
no longer returns null
when called on a Window
which has no presentation ({{bug(1467722)}}).No changes.
No changes.
No changes.
No changes.
No changes.
No changes.
No changes.
No changes.
webRequest.getSecurityInfo()
API to examine details of TLS connections ({{bug(1322748)}}).browserSettings.newTabPosition
to customize where new tabs open ({{bug(1344749)}}).windowTypes
has been deprecated in windows.get()
, windows.getCurrent()
and windows.getLastFocused()
({{bug(1419132)}}).open_at_install
property of the sidebar_action
manifest key enables extensions to control whether their sidebars should open automatically on install or not ({{bug(1460910)}}).browser_style
property of various manifest keys:
page_action
and browser_action
it defaults to falsesidebar_action
and options_ui
it defaults to true.tab_background_separator
property of the theme
manifest key enables extensions to change the color of the tab separator.{{Firefox_for_developers(61)}}