files/en-us/mozilla/firefox/releases/106/index.md
This article provides information about the changes in Firefox 106 that will affect developers. Firefox 106 was released on October 18, 2022.
height & width attributes when it is a child of a {{HTMLElement("picture")}} element.
This functionality is an experimental feature enabled using the dom.picture_source_dimension_attributes.enabled preference (Firefox bug 1694741).<semantics> and <maction> MathML elements now only render the first child element by default (Firefox bug 1588733).font-tech() and font-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).No notable changes.
HTMLMetaElement.media property is now supported. This property enables you to set different theme colors based on media values (e.g., max-width: 600px).
Meta elements with media properties allow the browser to use the content value in conjunction with theme-color to set the page or UI colors for a given media query (Firefox bug 1706179).Added basic support for the script.getRealms command that is currently limited to the WindowRealmInfo type which includes window realms and sandbox realms (Firefox bug 1766240).
Added support for the browsingContext.load event, which is emitted when a load 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 and script.disown commands (Firefox bug 1778976).
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).
"background" manifest key property "persistent" to false for Manifest V2 (to make a background page non-persistent) is now available by default.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.