Firefox 106 for developers
This article provides information about the changes in Firefox 106 that will affect developers. Firefox 106 was released on October 18, 2022.
Changes for web developers
HTML
-
The
<source>
element now supportsheight
&width
attributes when it is a child of a<picture>
element. This functionality is an experimental feature enabled using thedom.picture_source_dimension_attributes.enabled
preference (Firefox bug 1694741).
MathML
- The
<semantics>
and<maction>
MathML elements now only render the first child element by default (Firefox bug 1588733).
CSS
-
The @supports at-rule now supports the
font-tech()
andfont-format()
functions. These functions can be used to test whether a browser supports a given font technology or format and CSS styles can be applied based on the result (Firefox bug 1786493).
JavaScript
No notable changes.
HTTP
No notable changes.
Security
No notable changes.
APIs
DOM
-
The
HTMLMetaElement.media
property is now supported. This property enables you to set different theme colors based onmedia
values (e.g.max-width: 600px
). Meta elements withmedia
properties allow the browser to use thecontent
value in conjunction withtheme-color
to set the page or UI colors for a given media query (Firefox bug 1706179).
WebAssembly
No notable changes.
WebDriver conformance (WebDriver BiDi, Marionette)
WebDriver BiDi
- Added basic support for the
script.getRealms
command that is currently limited to theWindowRealmInfo
type which includes window realms and sandbox realms (Firefox bug 1766240). - Added support for the
browsingContext.load
event, which is emitted when aload
event is triggered on a BrowsingContext's window (Firefox bug 1756619). - Added an object reference store to hold strong references for serialized remote values (Firefox bug 1770736).
- Added support for de-serializing remote references created in the object reference store (Firefox bug 1788124).
- Added full support for the
script.evaluate
,script.callFunction
andscript.disown
commands (Firefox bug 1778976).
Marionette
- Added support for
wheel
input source for Actions, which is associated with a wheel-type input device (Firefox bug 1746601). - Added support for opening and closing tabs in GeckoView based applications (eg. Firefox for Android) (Firefox bug 1506782).
Changes for add-on developers
- The ability to set the
"background"
manifest key property"persistent"
tofalse
for Manifest V2 (to make a background page non-persistent) is now available by default. - The
object-src
directive in the"content_security_policy"
manifest key is now optional (Firefox bug 1766881). See object-src directive on the"content_security_policy"
manifest key page for more details.
Older versions
- Firefox 105 for developers
- Firefox 104 for developers
- Firefox 103 for developers
- Firefox 102 for developers
- Firefox 101 for developers
- Firefox 100 for developers
- Firefox 99 for developers
- Firefox 98 for developers
- Firefox 97 for developers
- Firefox 96 for developers
- Firefox 95 for developers
- Firefox 94 for developers
- Firefox 93 for developers
- Firefox 92 for developers
- Firefox 91 for developers
- Firefox 90 for developers
- Firefox 89 for developers
- Firefox 88 for developers
- Firefox 87 for developers
- Firefox 86 for developers
- Firefox 85 for developers
- Firefox 84 for developers
- Firefox 83 for developers
- Firefox 82 for developers
- Firefox 81 for developers
- Firefox 80 for developers
- Firefox 79 for developers
- Firefox 78 for developers
- Firefox 77 for developers
- Firefox 76 for developers
- Firefox 75 for developers